@ ProgramNode (location: (1,0)-(7,28))
├── locals: []
└── statements:
    @ StatementsNode (location: (1,0)-(7,28))
    └── body: (length: 4)
        ├── @ DefNode (location: (1,0)-(1,12))
        │   ├── name: :foo
        │   ├── name_loc: (1,4)-(1,7) = "foo"
        │   ├── receiver: ∅
        │   ├── parameters: ∅
        │   ├── body:
        │   │   @ StatementsNode (location: (1,10)-(1,12))
        │   │   └── body: (length: 1)
        │   │       └── @ IntegerNode (location: (1,10)-(1,12))
        │   │           ├── flags: decimal
        │   │           └── value: 42
        │   ├── locals: []
        │   ├── def_keyword_loc: (1,0)-(1,3) = "def"
        │   ├── operator_loc: ∅
        │   ├── lparen_loc: ∅
        │   ├── rparen_loc: ∅
        │   ├── equal_loc: (1,8)-(1,9) = "="
        │   └── end_keyword_loc: ∅
        ├── @ DefNode (location: (3,0)-(3,23))
        │   ├── name: :foo
        │   ├── name_loc: (3,4)-(3,7) = "foo"
        │   ├── receiver: ∅
        │   ├── parameters: ∅
        │   ├── body:
        │   │   @ StatementsNode (location: (3,10)-(3,23))
        │   │   └── body: (length: 1)
        │   │       └── @ RescueModifierNode (location: (3,10)-(3,23))
        │   │           ├── expression:
        │   │           │   @ IntegerNode (location: (3,10)-(3,12))
        │   │           │   ├── flags: decimal
        │   │           │   └── value: 42
        │   │           ├── keyword_loc: (3,13)-(3,19) = "rescue"
        │   │           └── rescue_expression:
        │   │               @ NilNode (location: (3,20)-(3,23))
        │   ├── locals: []
        │   ├── def_keyword_loc: (3,0)-(3,3) = "def"
        │   ├── operator_loc: ∅
        │   ├── lparen_loc: ∅
        │   ├── rparen_loc: ∅
        │   ├── equal_loc: (3,8)-(3,9) = "="
        │   └── end_keyword_loc: ∅
        ├── @ DefNode (location: (5,0)-(5,17))
        │   ├── name: :foo
        │   ├── name_loc: (5,9)-(5,12) = "foo"
        │   ├── receiver:
        │   │   @ SelfNode (location: (5,4)-(5,8))
        │   ├── parameters: ∅
        │   ├── body:
        │   │   @ StatementsNode (location: (5,15)-(5,17))
        │   │   └── body: (length: 1)
        │   │       └── @ IntegerNode (location: (5,15)-(5,17))
        │   │           ├── flags: decimal
        │   │           └── value: 42
        │   ├── locals: []
        │   ├── def_keyword_loc: (5,0)-(5,3) = "def"
        │   ├── operator_loc: (5,8)-(5,9) = "."
        │   ├── lparen_loc: ∅
        │   ├── rparen_loc: ∅
        │   ├── equal_loc: (5,13)-(5,14) = "="
        │   └── end_keyword_loc: ∅
        └── @ DefNode (location: (7,0)-(7,28))
            ├── name: :foo
            ├── name_loc: (7,9)-(7,12) = "foo"
            ├── receiver:
            │   @ SelfNode (location: (7,4)-(7,8))
            ├── parameters: ∅
            ├── body:
            │   @ StatementsNode (location: (7,15)-(7,28))
            │   └── body: (length: 1)
            │       └── @ RescueModifierNode (location: (7,15)-(7,28))
            │           ├── expression:
            │           │   @ IntegerNode (location: (7,15)-(7,17))
            │           │   ├── flags: decimal
            │           │   └── value: 42
            │           ├── keyword_loc: (7,18)-(7,24) = "rescue"
            │           └── rescue_expression:
            │               @ NilNode (location: (7,25)-(7,28))
            ├── locals: []
            ├── def_keyword_loc: (7,0)-(7,3) = "def"
            ├── operator_loc: (7,8)-(7,9) = "."
            ├── lparen_loc: ∅
            ├── rparen_loc: ∅
            ├── equal_loc: (7,13)-(7,14) = "="
            └── end_keyword_loc: ∅