@ ProgramNode (location: (1,0)-(17,20))
├── locals: [:x, :a]
└── statements:
    @ StatementsNode (location: (1,0)-(17,20))
    └── body: (length: 5)
        ├── @ CallNode (location: (1,0)-(2,12))
        │   ├── flags: ignore_visibility
        │   ├── receiver: ∅
        │   ├── call_operator_loc: ∅
        │   ├── name: :puts
        │   ├── message_loc: (1,0)-(1,4) = "puts"
        │   ├── opening_loc: ∅
        │   ├── arguments:
        │   │   @ ArgumentsNode (location: (1,5)-(2,12))
        │   │   ├── flags: ∅
        │   │   └── arguments: (length: 1)
        │   │       └── @ InterpolatedStringNode (location: (1,5)-(2,12))
        │   │           ├── flags: ∅
        │   │           ├── opening_loc: ∅
        │   │           ├── parts: (length: 2)
        │   │           │   ├── @ StringNode (location: (1,5)-(1,9))
        │   │           │   │   ├── flags: frozen
        │   │           │   │   ├── opening_loc: (1,5)-(1,6) = "\""
        │   │           │   │   ├── content_loc: (1,6)-(1,8) = "hi"
        │   │           │   │   ├── closing_loc: (1,8)-(1,9) = "\""
        │   │           │   │   └── unescaped: "hi"
        │   │           │   └── @ StringNode (location: (2,5)-(2,12))
        │   │           │       ├── flags: frozen
        │   │           │       ├── opening_loc: (2,5)-(2,6) = "\""
        │   │           │       ├── content_loc: (2,6)-(2,11) = "there"
        │   │           │       ├── closing_loc: (2,11)-(2,12) = "\""
        │   │           │       └── unescaped: "there"
        │   │           └── closing_loc: ∅
        │   ├── closing_loc: ∅
        │   └── block: ∅
        ├── @ ArrayNode (location: (4,0)-(5,2))
        │   ├── flags: ∅
        │   ├── elements: (length: 1)
        │   │   └── @ SymbolNode (location: (4,3)-(5,1))
        │   │       ├── flags: forced_us_ascii_encoding
        │   │       ├── opening_loc: ∅
        │   │       ├── value_loc: (4,3)-(5,1) = "a\\\r\nb"
        │   │       ├── closing_loc: ∅
        │   │       └── unescaped: "a\nb"
        │   ├── opening_loc: (4,0)-(4,3) = "%I{"
        │   └── closing_loc: (5,1)-(5,2) = "}"
        ├── @ StringNode (location: (7,0)-(7,4))
        │   ├── flags: ∅
        │   ├── opening_loc: (7,0)-(7,4) = "<<-E"
        │   ├── content_loc: (8,0)-(11,0) = "    1 \\\r\n    2\r\n    3\r\n"
        │   ├── closing_loc: (11,0)-(12,0) = "E\r\n"
        │   └── unescaped: "    1     2\n    3\n"
        ├── @ LocalVariableWriteNode (location: (13,0)-(15,0))
        │   ├── name: :x
        │   ├── depth: 0
        │   ├── name_loc: (13,0)-(13,1) = "x"
        │   ├── value:
        │   │   @ StringNode (location: (13,4)-(15,0))
        │   │   ├── flags: ∅
        │   │   ├── opening_loc: (13,4)-(14,0) = "%\r\n"
        │   │   ├── content_loc: (14,0)-(14,0) = ""
        │   │   ├── closing_loc: (14,0)-(15,0) = "\r\n"
        │   │   └── unescaped: ""
        │   └── operator_loc: (13,2)-(13,3) = "="
        └── @ LocalVariableWriteNode (location: (17,0)-(17,20))
            ├── name: :a
            ├── depth: 0
            ├── name_loc: (17,0)-(17,1) = "a"
            ├── value:
            │   @ CallNode (location: (17,4)-(17,20))
            │   ├── flags: ignore_visibility
            │   ├── receiver: ∅
            │   ├── call_operator_loc: ∅
            │   ├── name: :foo
            │   ├── message_loc: (17,4)-(17,7) = "foo"
            │   ├── opening_loc: (17,7)-(17,8) = "("
            │   ├── arguments:
            │   │   @ ArgumentsNode (location: (17,8)-(17,19))
            │   │   ├── flags: ∅
            │   │   └── arguments: (length: 1)
            │   │       └── @ CallNode (location: (17,8)-(17,19))
            │   │           ├── flags: ∅
            │   │           ├── receiver:
            │   │           │   @ InterpolatedStringNode (location: (17,8)-(17,14))
            │   │           │   ├── flags: ∅
            │   │           │   ├── opening_loc: (17,8)-(17,14) = "<<~EOF"
            │   │           │   ├── parts: (length: 2)
            │   │           │   │   ├── @ StringNode (location: (18,0)-(19,0))
            │   │           │   │   │   ├── flags: frozen
            │   │           │   │   │   ├── opening_loc: ∅
            │   │           │   │   │   ├── content_loc: (18,0)-(19,0) = "\r\n"
            │   │           │   │   │   ├── closing_loc: ∅
            │   │           │   │   │   └── unescaped: "\n"
            │   │           │   │   └── @ StringNode (location: (19,0)-(20,0))
            │   │           │   │       ├── flags: frozen
            │   │           │   │       ├── opening_loc: ∅
            │   │           │   │       ├── content_loc: (19,0)-(20,0) = "    baz\r\n"
            │   │           │   │       ├── closing_loc: ∅
            │   │           │   │       └── unescaped: "baz\n"
            │   │           │   └── closing_loc: (20,0)-(21,0) = "  EOF\r\n"
            │   │           ├── call_operator_loc: (17,14)-(17,15) = "."
            │   │           ├── name: :chop
            │   │           ├── message_loc: (17,15)-(17,19) = "chop"
            │   │           ├── opening_loc: ∅
            │   │           ├── arguments: ∅
            │   │           ├── closing_loc: ∅
            │   │           └── block: ∅
            │   ├── closing_loc: (17,19)-(17,20) = ")"
            │   └── block: ∅
            └── operator_loc: (17,2)-(17,3) = "="