@ ProgramNode (location: (1,0)-(127,11))
├── locals: []
└── statements:
    @ StatementsNode (location: (1,0)-(127,11))
    └── body: (length: 33)
        ├── @ StringNode (location: (1,0)-(1,5))
        │   ├── flags: ∅
        │   ├── opening_loc: (1,0)-(1,5) = "<<DOC"
        │   ├── content_loc: (2,0)-(2,0) = ""
        │   ├── closing_loc: (2,0)-(3,0) = "DOC\n"
        │   └── unescaped: ""
        ├── @ StringNode (location: (4,0)-(4,7))
        │   ├── flags: ∅
        │   ├── opening_loc: (4,0)-(4,7) = "<<'DOC'"
        │   ├── content_loc: (5,0)-(5,0) = ""
        │   ├── closing_loc: (5,0)-(6,0) = "DOC\n"
        │   └── unescaped: ""
        ├── @ StringNode (location: (7,0)-(7,6))
        │   ├── flags: ∅
        │   ├── opening_loc: (7,0)-(7,6) = "<<~DOC"
        │   ├── content_loc: (8,0)-(8,0) = ""
        │   ├── closing_loc: (8,0)-(9,0) = "DOC\n"
        │   └── unescaped: ""
        ├── @ StringNode (location: (10,0)-(10,8))
        │   ├── flags: ∅
        │   ├── opening_loc: (10,0)-(10,8) = "<<~'DOC'"
        │   ├── content_loc: (11,0)-(11,0) = ""
        │   ├── closing_loc: (11,0)-(12,0) = "DOC\n"
        │   └── unescaped: ""
        ├── @ StringNode (location: (13,0)-(13,5))
        │   ├── flags: ∅
        │   ├── opening_loc: (13,0)-(13,5) = "<<DOC"
        │   ├── content_loc: (14,0)-(15,0) = "  a\n"
        │   ├── closing_loc: (15,0)-(16,0) = "DOC\n"
        │   └── unescaped: "  a\n"
        ├── @ StringNode (location: (17,0)-(17,7))
        │   ├── flags: ∅
        │   ├── opening_loc: (17,0)-(17,7) = "<<'DOC'"
        │   ├── content_loc: (18,0)-(19,0) = "  a\n"
        │   ├── closing_loc: (19,0)-(20,0) = "DOC\n"
        │   └── unescaped: "  a\n"
        ├── @ InterpolatedStringNode (location: (21,0)-(21,5))
        │   ├── flags: ∅
        │   ├── opening_loc: (21,0)-(21,5) = "<<DOC"
        │   ├── parts: (length: 3)
        │   │   ├── @ StringNode (location: (22,0)-(23,2))
        │   │   │   ├── flags: frozen
        │   │   │   ├── opening_loc: ∅
        │   │   │   ├── content_loc: (22,0)-(23,2) = "  a\n  "
        │   │   │   ├── closing_loc: ∅
        │   │   │   └── unescaped: "  a\n  "
        │   │   ├── @ EmbeddedStatementsNode (location: (23,2)-(23,5))
        │   │   │   ├── opening_loc: (23,2)-(23,4) = "\#{"
        │   │   │   ├── statements: ∅
        │   │   │   └── closing_loc: (23,4)-(23,5) = "}"
        │   │   └── @ StringNode (location: (23,5)-(24,0))
        │   │       ├── flags: frozen
        │   │       ├── opening_loc: ∅
        │   │       ├── content_loc: (23,5)-(24,0) = "\n"
        │   │       ├── closing_loc: ∅
        │   │       └── unescaped: "\n"
        │   └── closing_loc: (24,0)-(25,0) = "DOC\n"
        ├── @ InterpolatedStringNode (location: (26,0)-(26,6))
        │   ├── flags: ∅
        │   ├── opening_loc: (26,0)-(26,6) = "<<~DOC"
        │   ├── parts: (length: 3)
        │   │   ├── @ StringNode (location: (27,0)-(28,0))
        │   │   │   ├── flags: frozen
        │   │   │   ├── opening_loc: ∅
        │   │   │   ├── content_loc: (27,0)-(28,0) = "  a\n"
        │   │   │   ├── closing_loc: ∅
        │   │   │   └── unescaped: "a\n"
        │   │   ├── @ EmbeddedStatementsNode (location: (28,2)-(28,5))
        │   │   │   ├── opening_loc: (28,2)-(28,4) = "\#{"
        │   │   │   ├── statements: ∅
        │   │   │   └── closing_loc: (28,4)-(28,5) = "}"
        │   │   └── @ StringNode (location: (28,5)-(29,0))
        │   │       ├── flags: frozen
        │   │       ├── opening_loc: ∅
        │   │       ├── content_loc: (28,5)-(29,0) = "\n"
        │   │       ├── closing_loc: ∅
        │   │       └── unescaped: "\n"
        │   └── closing_loc: (29,0)-(30,0) = "DOC\n"
        ├── @ InterpolatedStringNode (location: (31,0)-(31,6))
        │   ├── flags: ∅
        │   ├── opening_loc: (31,0)-(31,6) = "<<~DOC"
        │   ├── parts: (length: 4)
        │   │   ├── @ StringNode (location: (32,0)-(33,0))
        │   │   │   ├── flags: frozen
        │   │   │   ├── opening_loc: ∅
        │   │   │   ├── content_loc: (32,0)-(33,0) = "  a\n"
        │   │   │   ├── closing_loc: ∅
        │   │   │   └── unescaped: "a\n"
        │   │   ├── @ EmbeddedStatementsNode (location: (33,2)-(33,5))
        │   │   │   ├── opening_loc: (33,2)-(33,4) = "\#{"
        │   │   │   ├── statements: ∅
        │   │   │   └── closing_loc: (33,4)-(33,5) = "}"
        │   │   ├── @ StringNode (location: (33,5)-(34,0))
        │   │   │   ├── flags: frozen
        │   │   │   ├── opening_loc: ∅
        │   │   │   ├── content_loc: (33,5)-(34,0) = "\n"
        │   │   │   ├── closing_loc: ∅
        │   │   │   └── unescaped: "\n"
        │   │   └── @ StringNode (location: (34,0)-(35,0))
        │   │       ├── flags: frozen
        │   │       ├── opening_loc: ∅
        │   │       ├── content_loc: (34,0)-(35,0) = "  b\n"
        │   │       ├── closing_loc: ∅
        │   │       └── unescaped: "b\n"
        │   └── closing_loc: (35,0)-(36,0) = "DOC\n"
        ├── @ InterpolatedStringNode (location: (37,0)-(37,6))
        │   ├── flags: ∅
        │   ├── opening_loc: (37,0)-(37,6) = "<<~DOC"
        │   ├── parts: (length: 2)
        │   │   ├── @ StringNode (location: (38,0)-(39,0))
        │   │   │   ├── flags: frozen
        │   │   │   ├── opening_loc: ∅
        │   │   │   ├── content_loc: (38,0)-(39,0) = "  a\n"
        │   │   │   ├── closing_loc: ∅
        │   │   │   └── unescaped: "a\n"
        │   │   └── @ StringNode (location: (39,0)-(40,0))
        │   │       ├── flags: frozen
        │   │       ├── opening_loc: ∅
        │   │       ├── content_loc: (39,0)-(40,0) = "    b\n"
        │   │       ├── closing_loc: ∅
        │   │       └── unescaped: "  b\n"
        │   └── closing_loc: (40,0)-(41,0) = "DOC\n"
        ├── @ StringNode (location: (42,0)-(42,7))
        │   ├── flags: ∅
        │   ├── opening_loc: (42,0)-(42,7) = "<<'DOC'"
        │   ├── content_loc: (43,0)-(46,0) = "a\n\nb\n"
        │   ├── closing_loc: (46,0)-(47,0) = "DOC\n"
        │   └── unescaped: "a\n\nb\n"
        ├── @ StringNode (location: (48,0)-(48,7))
        │   ├── flags: ∅
        │   ├── opening_loc: (48,0)-(48,7) = "<<'DOC'"
        │   ├── content_loc: (49,0)-(52,0) = " a\n\n b\n"
        │   ├── closing_loc: (52,0)-(53,0) = "DOC\n"
        │   └── unescaped: " a\n\n b\n"
        ├── @ StringNode (location: (54,0)-(54,7))
        │   ├── flags: ∅
        │   ├── opening_loc: (54,0)-(54,7) = "<<'DOC'"
        │   ├── content_loc: (55,0)-(56,0) = " a\\nb\n"
        │   ├── closing_loc: (56,0)-(57,0) = "DOC\n"
        │   └── unescaped: " a\\nb\n"
        ├── @ InterpolatedStringNode (location: (58,0)-(58,5))
        │   ├── flags: ∅
        │   ├── opening_loc: (58,0)-(58,5) = "<<DOC"
        │   ├── parts: (length: 4)
        │   │   ├── @ EmbeddedStatementsNode (location: (59,0)-(59,3))
        │   │   │   ├── opening_loc: (59,0)-(59,2) = "\#{"
        │   │   │   ├── statements: ∅
        │   │   │   └── closing_loc: (59,2)-(59,3) = "}"
        │   │   ├── @ StringNode (location: (59,3)-(60,1))
        │   │   │   ├── flags: frozen
        │   │   │   ├── opening_loc: ∅
        │   │   │   ├── content_loc: (59,3)-(60,1) = "a\n "
        │   │   │   ├── closing_loc: ∅
        │   │   │   └── unescaped: "a\n "
        │   │   ├── @ EmbeddedStatementsNode (location: (60,1)-(60,4))
        │   │   │   ├── opening_loc: (60,1)-(60,3) = "\#{"
        │   │   │   ├── statements: ∅
        │   │   │   └── closing_loc: (60,3)-(60,4) = "}"
        │   │   └── @ StringNode (location: (60,4)-(61,0))
        │   │       ├── flags: frozen
        │   │       ├── opening_loc: ∅
        │   │       ├── content_loc: (60,4)-(61,0) = "a\n"
        │   │       ├── closing_loc: ∅
        │   │       └── unescaped: "a\n"
        │   └── closing_loc: (61,0)-(62,0) = "DOC\n"
        ├── @ InterpolatedStringNode (location: (63,0)-(63,5))
        │   ├── flags: ∅
        │   ├── opening_loc: (63,0)-(63,5) = "<<DOC"
        │   ├── parts: (length: 3)
        │   │   ├── @ StringNode (location: (64,0)-(64,2))
        │   │   │   ├── flags: frozen
        │   │   │   ├── opening_loc: ∅
        │   │   │   ├── content_loc: (64,0)-(64,2) = "  "
        │   │   │   ├── closing_loc: ∅
        │   │   │   └── unescaped: "  "
        │   │   ├── @ EmbeddedStatementsNode (location: (64,2)-(64,5))
        │   │   │   ├── opening_loc: (64,2)-(64,4) = "\#{"
        │   │   │   ├── statements: ∅
        │   │   │   └── closing_loc: (64,4)-(64,5) = "}"
        │   │   └── @ StringNode (location: (64,5)-(66,0))
        │   │       ├── flags: frozen
        │   │       ├── opening_loc: ∅
        │   │       ├── content_loc: (64,5)-(66,0) = "\n  \\\#{}\n"
        │   │       ├── closing_loc: ∅
        │   │       └── unescaped: "\n  \#{}\n"
        │   └── closing_loc: (66,0)-(67,0) = "DOC\n"
        ├── @ InterpolatedStringNode (location: (68,0)-(68,5))
        │   ├── flags: ∅
        │   ├── opening_loc: (68,0)-(68,5) = "<<DOC"
        │   ├── parts: (length: 3)
        │   │   ├── @ StringNode (location: (69,0)-(69,2))
        │   │   │   ├── flags: frozen
        │   │   │   ├── opening_loc: ∅
        │   │   │   ├── content_loc: (69,0)-(69,2) = " a"
        │   │   │   ├── closing_loc: ∅
        │   │   │   └── unescaped: " a"
        │   │   ├── @ EmbeddedStatementsNode (location: (69,2)-(69,5))
        │   │   │   ├── opening_loc: (69,2)-(69,4) = "\#{"
        │   │   │   ├── statements: ∅
        │   │   │   └── closing_loc: (69,4)-(69,5) = "}"
        │   │   └── @ StringNode (location: (69,5)-(71,0))
        │   │       ├── flags: frozen
        │   │       ├── opening_loc: ∅
        │   │       ├── content_loc: (69,5)-(71,0) = "b\n c\n"
        │   │       ├── closing_loc: ∅
        │   │       └── unescaped: "b\n c\n"
        │   └── closing_loc: (71,0)-(72,0) = "DOC\n"
        ├── @ InterpolatedStringNode (location: (73,0)-(73,6))
        │   ├── flags: ∅
        │   ├── opening_loc: (73,0)-(73,6) = "<<~DOC"
        │   ├── parts: (length: 2)
        │   │   ├── @ EmbeddedStatementsNode (location: (74,2)-(74,5))
        │   │   │   ├── opening_loc: (74,2)-(74,4) = "\#{"
        │   │   │   ├── statements: ∅
        │   │   │   └── closing_loc: (74,4)-(74,5) = "}"
        │   │   └── @ StringNode (location: (74,5)-(75,0))
        │   │       ├── flags: frozen
        │   │       ├── opening_loc: ∅
        │   │       ├── content_loc: (74,5)-(75,0) = "\n"
        │   │       ├── closing_loc: ∅
        │   │       └── unescaped: "\n"
        │   └── closing_loc: (75,0)-(76,0) = "DOC\n"
        ├── @ IfNode (location: (77,0)-(81,3))
        │   ├── if_keyword_loc: (77,0)-(77,2) = "if"
        │   ├── predicate:
        │   │   @ TrueNode (location: (77,3)-(77,7))
        │   ├── then_keyword_loc: ∅
        │   ├── statements:
        │   │   @ StatementsNode (location: (78,2)-(78,8))
        │   │   └── body: (length: 1)
        │   │       └── @ InterpolatedStringNode (location: (78,2)-(78,8))
        │   │           ├── flags: ∅
        │   │           ├── opening_loc: (78,2)-(78,8) = "<<~DOC"
        │   │           ├── parts: (length: 2)
        │   │           │   ├── @ EmbeddedStatementsNode (location: (79,4)-(79,7))
        │   │           │   │   ├── opening_loc: (79,4)-(79,6) = "\#{"
        │   │           │   │   ├── statements: ∅
        │   │           │   │   └── closing_loc: (79,6)-(79,7) = "}"
        │   │           │   └── @ StringNode (location: (79,7)-(80,0))
        │   │           │       ├── flags: frozen
        │   │           │       ├── opening_loc: ∅
        │   │           │       ├── content_loc: (79,7)-(80,0) = "\n"
        │   │           │       ├── closing_loc: ∅
        │   │           │       └── unescaped: "\n"
        │   │           └── closing_loc: (80,0)-(81,0) = "  DOC\n"
        │   ├── consequent: ∅
        │   └── end_keyword_loc: (81,0)-(81,3) = "end"
        ├── @ IfNode (location: (83,0)-(87,3))
        │   ├── if_keyword_loc: (83,0)-(83,2) = "if"
        │   ├── predicate:
        │   │   @ TrueNode (location: (83,3)-(83,7))
        │   ├── then_keyword_loc: ∅
        │   ├── statements:
        │   │   @ StatementsNode (location: (84,2)-(84,8))
        │   │   └── body: (length: 1)
        │   │       └── @ InterpolatedStringNode (location: (84,2)-(84,8))
        │   │           ├── flags: ∅
        │   │           ├── opening_loc: (84,2)-(84,8) = "<<~DOC"
        │   │           ├── parts: (length: 3)
        │   │           │   ├── @ StringNode (location: (85,0)-(85,5))
        │   │           │   │   ├── flags: frozen
        │   │           │   │   ├── opening_loc: ∅
        │   │           │   │   ├── content_loc: (85,0)-(85,5) = "    b"
        │   │           │   │   ├── closing_loc: ∅
        │   │           │   │   └── unescaped: "b"
        │   │           │   ├── @ EmbeddedStatementsNode (location: (85,5)-(85,8))
        │   │           │   │   ├── opening_loc: (85,5)-(85,7) = "\#{"
        │   │           │   │   ├── statements: ∅
        │   │           │   │   └── closing_loc: (85,7)-(85,8) = "}"
        │   │           │   └── @ StringNode (location: (85,8)-(86,0))
        │   │           │       ├── flags: frozen
        │   │           │       ├── opening_loc: ∅
        │   │           │       ├── content_loc: (85,8)-(86,0) = "\n"
        │   │           │       ├── closing_loc: ∅
        │   │           │       └── unescaped: "\n"
        │   │           └── closing_loc: (86,0)-(87,0) = "  DOC\n"
        │   ├── consequent: ∅
        │   └── end_keyword_loc: (87,0)-(87,3) = "end"
        ├── @ IfNode (location: (89,0)-(93,3))
        │   ├── if_keyword_loc: (89,0)-(89,2) = "if"
        │   ├── predicate:
        │   │   @ TrueNode (location: (89,3)-(89,7))
        │   ├── then_keyword_loc: ∅
        │   ├── statements:
        │   │   @ StatementsNode (location: (90,2)-(90,8))
        │   │   └── body: (length: 1)
        │   │       └── @ InterpolatedStringNode (location: (90,2)-(90,8))
        │   │           ├── flags: ∅
        │   │           ├── opening_loc: (90,2)-(90,8) = "<<~DOC"
        │   │           ├── parts: (length: 2)
        │   │           │   ├── @ EmbeddedStatementsNode (location: (91,4)-(91,7))
        │   │           │   │   ├── opening_loc: (91,4)-(91,6) = "\#{"
        │   │           │   │   ├── statements: ∅
        │   │           │   │   └── closing_loc: (91,6)-(91,7) = "}"
        │   │           │   └── @ StringNode (location: (91,7)-(92,0))
        │   │           │       ├── flags: frozen
        │   │           │       ├── opening_loc: ∅
        │   │           │       ├── content_loc: (91,7)-(92,0) = "a\n"
        │   │           │       ├── closing_loc: ∅
        │   │           │       └── unescaped: "a\n"
        │   │           └── closing_loc: (92,0)-(93,0) = "  DOC\n"
        │   ├── consequent: ∅
        │   └── end_keyword_loc: (93,0)-(93,3) = "end"
        ├── @ IfNode (location: (95,0)-(101,3))
        │   ├── if_keyword_loc: (95,0)-(95,2) = "if"
        │   ├── predicate:
        │   │   @ TrueNode (location: (95,3)-(95,7))
        │   ├── then_keyword_loc: ∅
        │   ├── statements:
        │   │   @ StatementsNode (location: (96,2)-(96,10))
        │   │   └── body: (length: 1)
        │   │       └── @ StringNode (location: (96,2)-(96,10))
        │   │           ├── flags: ∅
        │   │           ├── opening_loc: (96,2)-(96,10) = "<<-'DOC'"
        │   │           ├── content_loc: (97,0)-(100,0) = "   a\n\n   b\n"
        │   │           ├── closing_loc: (100,0)-(101,0) = "  DOC\n"
        │   │           └── unescaped: "   a\n\n   b\n"
        │   ├── consequent: ∅
        │   └── end_keyword_loc: (101,0)-(101,3) = "end"
        ├── @ InterpolatedStringNode (location: (103,0)-(103,6))
        │   ├── flags: ∅
        │   ├── opening_loc: (103,0)-(103,1) = "\""
        │   ├── parts: (length: 2)
        │   │   ├── @ EmbeddedStatementsNode (location: (103,1)-(103,4))
        │   │   │   ├── opening_loc: (103,1)-(103,3) = "\#{"
        │   │   │   ├── statements: ∅
        │   │   │   └── closing_loc: (103,3)-(103,4) = "}"
        │   │   └── @ StringNode (location: (103,4)-(103,5))
        │   │       ├── flags: frozen
        │   │       ├── opening_loc: ∅
        │   │       ├── content_loc: (103,4)-(103,5) = "a"
        │   │       ├── closing_loc: ∅
        │   │       └── unescaped: "a"
        │   └── closing_loc: (103,5)-(103,6) = "\""
        ├── @ InterpolatedStringNode (location: (105,0)-(105,12))
        │   ├── flags: ∅
        │   ├── opening_loc: (105,0)-(105,2) = "%("
        │   ├── parts: (length: 3)
        │   │   ├── @ StringNode (location: (105,2)-(105,5))
        │   │   │   ├── flags: frozen
        │   │   │   ├── opening_loc: ∅
        │   │   │   ├── content_loc: (105,2)-(105,5) = "\\n\""
        │   │   │   ├── closing_loc: ∅
        │   │   │   └── unescaped: "\n\""
        │   │   ├── @ EmbeddedStatementsNode (location: (105,5)-(105,8))
        │   │   │   ├── opening_loc: (105,5)-(105,7) = "\#{"
        │   │   │   ├── statements: ∅
        │   │   │   └── closing_loc: (105,7)-(105,8) = "}"
        │   │   └── @ StringNode (location: (105,8)-(105,11))
        │   │       ├── flags: frozen
        │   │       ├── opening_loc: ∅
        │   │       ├── content_loc: (105,8)-(105,11) = "\"\\n"
        │   │       ├── closing_loc: ∅
        │   │       └── unescaped: "\"\n"
        │   └── closing_loc: (105,11)-(105,12) = ")"
        ├── @ InterpolatedStringNode (location: (107,0)-(107,14))
        │   ├── flags: ∅
        │   ├── opening_loc: (107,0)-(107,3) = "%Q("
        │   ├── parts: (length: 3)
        │   │   ├── @ StringNode (location: (107,3)-(107,7))
        │   │   │   ├── flags: frozen
        │   │   │   ├── opening_loc: ∅
        │   │   │   ├── content_loc: (107,3)-(107,7) = "-\\n\""
        │   │   │   ├── closing_loc: ∅
        │   │   │   └── unescaped: "-\n\""
        │   │   ├── @ EmbeddedStatementsNode (location: (107,7)-(107,10))
        │   │   │   ├── opening_loc: (107,7)-(107,9) = "\#{"
        │   │   │   ├── statements: ∅
        │   │   │   └── closing_loc: (107,9)-(107,10) = "}"
        │   │   └── @ StringNode (location: (107,10)-(107,13))
        │   │       ├── flags: frozen
        │   │       ├── opening_loc: ∅
        │   │       ├── content_loc: (107,10)-(107,13) = "\"\\n"
        │   │       ├── closing_loc: ∅
        │   │       └── unescaped: "\"\n"
        │   └── closing_loc: (107,13)-(107,14) = ")"
        ├── @ InterpolatedStringNode (location: (109,0)-(111,2))
        │   ├── flags: ∅
        │   ├── opening_loc: (109,0)-(109,1) = "\""
        │   ├── parts: (length: 3)
        │   │   ├── @ StringNode (location: (109,1)-(110,0))
        │   │   │   ├── flags: frozen
        │   │   │   ├── opening_loc: ∅
        │   │   │   ├── content_loc: (109,1)-(110,0) = "a\n"
        │   │   │   ├── closing_loc: ∅
        │   │   │   └── unescaped: "a\n"
        │   │   ├── @ EmbeddedStatementsNode (location: (110,0)-(110,3))
        │   │   │   ├── opening_loc: (110,0)-(110,2) = "\#{"
        │   │   │   ├── statements: ∅
        │   │   │   └── closing_loc: (110,2)-(110,3) = "}"
        │   │   └── @ StringNode (location: (110,3)-(111,1))
        │   │       ├── flags: frozen
        │   │       ├── opening_loc: ∅
        │   │       ├── content_loc: (110,3)-(111,1) = "\nb"
        │   │       ├── closing_loc: ∅
        │   │       └── unescaped: "\nb"
        │   └── closing_loc: (111,1)-(111,2) = "\""
        ├── @ InterpolatedStringNode (location: (113,0)-(114,2))
        │   ├── flags: ∅
        │   ├── opening_loc: (113,0)-(113,1) = "\""
        │   ├── parts: (length: 3)
        │   │   ├── @ StringNode (location: (113,1)-(113,4))
        │   │   │   ├── flags: frozen
        │   │   │   ├── opening_loc: ∅
        │   │   │   ├── content_loc: (113,1)-(113,4) = "a\\n"
        │   │   │   ├── closing_loc: ∅
        │   │   │   └── unescaped: "a\n"
        │   │   ├── @ EmbeddedStatementsNode (location: (113,4)-(113,7))
        │   │   │   ├── opening_loc: (113,4)-(113,6) = "\#{"
        │   │   │   ├── statements: ∅
        │   │   │   └── closing_loc: (113,6)-(113,7) = "}"
        │   │   └── @ StringNode (location: (113,7)-(114,1))
        │   │       ├── flags: frozen
        │   │       ├── opening_loc: ∅
        │   │       ├── content_loc: (113,7)-(114,1) = "\nb"
        │   │       ├── closing_loc: ∅
        │   │       └── unescaped: "\nb"
        │   └── closing_loc: (114,1)-(114,2) = "\""
        ├── @ InterpolatedStringNode (location: (116,0)-(117,7))
        │   ├── flags: ∅
        │   ├── opening_loc: (116,0)-(116,1) = "\""
        │   ├── parts: (length: 3)
        │   │   ├── @ StringNode (location: (116,1)-(117,0))
        │   │   │   ├── flags: frozen
        │   │   │   ├── opening_loc: ∅
        │   │   │   ├── content_loc: (116,1)-(117,0) = "a\n"
        │   │   │   ├── closing_loc: ∅
        │   │   │   └── unescaped: "a\n"
        │   │   ├── @ EmbeddedStatementsNode (location: (117,0)-(117,3))
        │   │   │   ├── opening_loc: (117,0)-(117,2) = "\#{"
        │   │   │   ├── statements: ∅
        │   │   │   └── closing_loc: (117,2)-(117,3) = "}"
        │   │   └── @ StringNode (location: (117,3)-(117,6))
        │   │       ├── flags: frozen
        │   │       ├── opening_loc: ∅
        │   │       ├── content_loc: (117,3)-(117,6) = "\\nb"
        │   │       ├── closing_loc: ∅
        │   │       └── unescaped: "\nb"
        │   └── closing_loc: (117,6)-(117,7) = "\""
        ├── @ InterpolatedStringNode (location: (119,0)-(120,5))
        │   ├── flags: ∅
        │   ├── opening_loc: ∅
        │   ├── parts: (length: 2)
        │   │   ├── @ StringNode (location: (119,0)-(119,3))
        │   │   │   ├── flags: frozen
        │   │   │   ├── opening_loc: (119,0)-(119,1) = "'"
        │   │   │   ├── content_loc: (119,1)-(119,2) = "a"
        │   │   │   ├── closing_loc: (119,2)-(119,3) = "'"
        │   │   │   └── unescaped: "a"
        │   │   └── @ InterpolatedStringNode (location: (120,0)-(120,5))
        │   │       ├── flags: ∅
        │   │       ├── opening_loc: (120,0)-(120,1) = "\""
        │   │       ├── parts: (length: 1)
        │   │       │   └── @ EmbeddedStatementsNode (location: (120,1)-(120,4))
        │   │       │       ├── opening_loc: (120,1)-(120,3) = "\#{"
        │   │       │       ├── statements: ∅
        │   │       │       └── closing_loc: (120,3)-(120,4) = "}"
        │   │       └── closing_loc: (120,4)-(120,5) = "\""
        │   └── closing_loc: ∅
        ├── @ InterpolatedStringNode (location: (122,0)-(122,8))
        │   ├── flags: ∅
        │   ├── opening_loc: ∅
        │   ├── parts: (length: 3)
        │   │   ├── @ StringNode (location: (122,0)-(122,2))
        │   │   │   ├── flags: frozen
        │   │   │   ├── opening_loc: (122,0)-(122,1) = "\""
        │   │   │   ├── content_loc: (122,1)-(122,1) = ""
        │   │   │   ├── closing_loc: (122,1)-(122,2) = "\""
        │   │   │   └── unescaped: ""
        │   │   ├── @ StringNode (location: (122,3)-(122,5))
        │   │   │   ├── flags: frozen
        │   │   │   ├── opening_loc: (122,3)-(122,4) = "\""
        │   │   │   ├── content_loc: (122,4)-(122,4) = ""
        │   │   │   ├── closing_loc: (122,4)-(122,5) = "\""
        │   │   │   └── unescaped: ""
        │   │   └── @ StringNode (location: (122,6)-(122,8))
        │   │       ├── flags: frozen
        │   │       ├── opening_loc: (122,6)-(122,7) = "\""
        │   │       ├── content_loc: (122,7)-(122,7) = ""
        │   │       ├── closing_loc: (122,7)-(122,8) = "\""
        │   │       └── unescaped: ""
        │   └── closing_loc: ∅
        ├── @ InterpolatedStringNode (location: (124,0)-(124,12))
        │   ├── flags: ∅
        │   ├── opening_loc: ∅
        │   ├── parts: (length: 2)
        │   │   ├── @ InterpolatedStringNode (location: (124,0)-(124,8))
        │   │   │   ├── flags: ∅
        │   │   │   ├── opening_loc: (124,0)-(124,1) = "\""
        │   │   │   ├── parts: (length: 2)
        │   │   │   │   ├── @ StringNode (location: (124,1)-(124,2))
        │   │   │   │   │   ├── flags: frozen
        │   │   │   │   │   ├── opening_loc: ∅
        │   │   │   │   │   ├── content_loc: (124,1)-(124,2) = "a"
        │   │   │   │   │   ├── closing_loc: ∅
        │   │   │   │   │   └── unescaped: "a"
        │   │   │   │   └── @ EmbeddedStatementsNode (location: (124,2)-(124,7))
        │   │   │   │       ├── opening_loc: (124,2)-(124,4) = "\#{"
        │   │   │   │       ├── statements:
        │   │   │   │       │   @ StatementsNode (location: (124,4)-(124,6))
        │   │   │   │       │   └── body: (length: 1)
        │   │   │   │       │       └── @ InstanceVariableReadNode (location: (124,4)-(124,6))
        │   │   │   │       │           └── name: :@a
        │   │   │   │       └── closing_loc: (124,6)-(124,7) = "}"
        │   │   │   └── closing_loc: (124,7)-(124,8) = "\""
        │   │   └── @ StringNode (location: (124,9)-(124,12))
        │   │       ├── flags: frozen
        │   │       ├── opening_loc: (124,9)-(124,10) = "\""
        │   │       ├── content_loc: (124,10)-(124,11) = "b"
        │   │       ├── closing_loc: (124,11)-(124,12) = "\""
        │   │       └── unescaped: "b"
        │   └── closing_loc: ∅
        ├── @ InterpolatedStringNode (location: (125,0)-(125,10))
        │   ├── flags: ∅
        │   ├── opening_loc: ∅
        │   ├── parts: (length: 2)
        │   │   ├── @ InterpolatedStringNode (location: (125,0)-(125,6))
        │   │   │   ├── flags: ∅
        │   │   │   ├── opening_loc: (125,0)-(125,1) = "\""
        │   │   │   ├── parts: (length: 2)
        │   │   │   │   ├── @ StringNode (location: (125,1)-(125,2))
        │   │   │   │   │   ├── flags: frozen
        │   │   │   │   │   ├── opening_loc: ∅
        │   │   │   │   │   ├── content_loc: (125,1)-(125,2) = "a"
        │   │   │   │   │   ├── closing_loc: ∅
        │   │   │   │   │   └── unescaped: "a"
        │   │   │   │   └── @ EmbeddedVariableNode (location: (125,2)-(125,5))
        │   │   │   │       ├── operator_loc: (125,2)-(125,3) = "#"
        │   │   │   │       └── variable:
        │   │   │   │           @ InstanceVariableReadNode (location: (125,3)-(125,5))
        │   │   │   │           └── name: :@a
        │   │   │   └── closing_loc: (125,5)-(125,6) = "\""
        │   │   └── @ StringNode (location: (125,7)-(125,10))
        │   │       ├── flags: frozen
        │   │       ├── opening_loc: (125,7)-(125,8) = "\""
        │   │       ├── content_loc: (125,8)-(125,9) = "b"
        │   │       ├── closing_loc: (125,9)-(125,10) = "\""
        │   │       └── unescaped: "b"
        │   └── closing_loc: ∅
        ├── @ InterpolatedStringNode (location: (126,0)-(126,10))
        │   ├── flags: ∅
        │   ├── opening_loc: ∅
        │   ├── parts: (length: 2)
        │   │   ├── @ InterpolatedStringNode (location: (126,0)-(126,6))
        │   │   │   ├── flags: ∅
        │   │   │   ├── opening_loc: (126,0)-(126,1) = "\""
        │   │   │   ├── parts: (length: 2)
        │   │   │   │   ├── @ StringNode (location: (126,1)-(126,2))
        │   │   │   │   │   ├── flags: frozen
        │   │   │   │   │   ├── opening_loc: ∅
        │   │   │   │   │   ├── content_loc: (126,1)-(126,2) = "a"
        │   │   │   │   │   ├── closing_loc: ∅
        │   │   │   │   │   └── unescaped: "a"
        │   │   │   │   └── @ EmbeddedVariableNode (location: (126,2)-(126,5))
        │   │   │   │       ├── operator_loc: (126,2)-(126,3) = "#"
        │   │   │   │       └── variable:
        │   │   │   │           @ GlobalVariableReadNode (location: (126,3)-(126,5))
        │   │   │   │           └── name: :$a
        │   │   │   └── closing_loc: (126,5)-(126,6) = "\""
        │   │   └── @ StringNode (location: (126,7)-(126,10))
        │   │       ├── flags: frozen
        │   │       ├── opening_loc: (126,7)-(126,8) = "\""
        │   │       ├── content_loc: (126,8)-(126,9) = "b"
        │   │       ├── closing_loc: (126,9)-(126,10) = "\""
        │   │       └── unescaped: "b"
        │   └── closing_loc: ∅
        └── @ InterpolatedStringNode (location: (127,0)-(127,11))
            ├── flags: ∅
            ├── opening_loc: ∅
            ├── parts: (length: 2)
            │   ├── @ InterpolatedStringNode (location: (127,0)-(127,7))
            │   │   ├── flags: ∅
            │   │   ├── opening_loc: (127,0)-(127,1) = "\""
            │   │   ├── parts: (length: 2)
            │   │   │   ├── @ StringNode (location: (127,1)-(127,2))
            │   │   │   │   ├── flags: frozen
            │   │   │   │   ├── opening_loc: ∅
            │   │   │   │   ├── content_loc: (127,1)-(127,2) = "a"
            │   │   │   │   ├── closing_loc: ∅
            │   │   │   │   └── unescaped: "a"
            │   │   │   └── @ EmbeddedVariableNode (location: (127,2)-(127,6))
            │   │   │       ├── operator_loc: (127,2)-(127,3) = "#"
            │   │   │       └── variable:
            │   │   │           @ ClassVariableReadNode (location: (127,3)-(127,6))
            │   │   │           └── name: :@@a
            │   │   └── closing_loc: (127,6)-(127,7) = "\""
            │   └── @ StringNode (location: (127,8)-(127,11))
            │       ├── flags: frozen
            │       ├── opening_loc: (127,8)-(127,9) = "\""
            │       ├── content_loc: (127,9)-(127,10) = "b"
            │       ├── closing_loc: (127,10)-(127,11) = "\""
            │       └── unescaped: "b"
            └── closing_loc: ∅