@ ProgramNode (location: (1,0)-(5,29))
├── locals: []
└── statements:
    @ StatementsNode (location: (1,0)-(5,29))
    └── body: (length: 3)
        ├── @ DefNode (location: (1,0)-(1,27))
        │   ├── name: :foo
        │   ├── name_loc: (1,4)-(1,7) = "foo"
        │   ├── receiver: ∅
        │   ├── parameters:
        │   │   @ ParametersNode (location: (1,8)-(1,11))
        │   │   ├── requireds: (length: 0)
        │   │   ├── optionals: (length: 0)
        │   │   ├── rest: ∅
        │   │   ├── posts: (length: 0)
        │   │   ├── keywords: (length: 0)
        │   │   ├── keyword_rest:
        │   │   │   @ ForwardingParameterNode (location: (1,8)-(1,11))
        │   │   └── block: ∅
        │   ├── body:
        │   │   @ StatementsNode (location: (1,14)-(1,22))
        │   │   └── body: (length: 1)
        │   │       └── @ CallNode (location: (1,14)-(1,22))
        │   │           ├── flags: ignore_visibility
        │   │           ├── receiver: ∅
        │   │           ├── call_operator_loc: ∅
        │   │           ├── name: :bar
        │   │           ├── message_loc: (1,14)-(1,17) = "bar"
        │   │           ├── opening_loc: (1,17)-(1,18) = "("
        │   │           ├── arguments:
        │   │           │   @ ArgumentsNode (location: (1,18)-(1,21))
        │   │           │   ├── flags: ∅
        │   │           │   └── arguments: (length: 1)
        │   │           │       └── @ ForwardingArgumentsNode (location: (1,18)-(1,21))
        │   │           ├── closing_loc: (1,21)-(1,22) = ")"
        │   │           └── block: ∅
        │   ├── locals: []
        │   ├── def_keyword_loc: (1,0)-(1,3) = "def"
        │   ├── operator_loc: ∅
        │   ├── lparen_loc: (1,7)-(1,8) = "("
        │   ├── rparen_loc: (1,11)-(1,12) = ")"
        │   ├── equal_loc: ∅
        │   └── end_keyword_loc: (1,24)-(1,27) = "end"
        ├── @ DefNode (location: (3,0)-(3,17))
        │   ├── name: :foo
        │   ├── name_loc: (3,4)-(3,7) = "foo"
        │   ├── receiver: ∅
        │   ├── parameters:
        │   │   @ ParametersNode (location: (3,8)-(3,11))
        │   │   ├── requireds: (length: 0)
        │   │   ├── optionals: (length: 0)
        │   │   ├── rest: ∅
        │   │   ├── posts: (length: 0)
        │   │   ├── keywords: (length: 0)
        │   │   ├── keyword_rest:
        │   │   │   @ ForwardingParameterNode (location: (3,8)-(3,11))
        │   │   └── block: ∅
        │   ├── body: ∅
        │   ├── locals: []
        │   ├── def_keyword_loc: (3,0)-(3,3) = "def"
        │   ├── operator_loc: ∅
        │   ├── lparen_loc: (3,7)-(3,8) = "("
        │   ├── rparen_loc: (3,11)-(3,12) = ")"
        │   ├── equal_loc: ∅
        │   └── end_keyword_loc: (3,14)-(3,17) = "end"
        └── @ DefNode (location: (5,0)-(5,29))
            ├── name: :foo
            ├── name_loc: (5,4)-(5,7) = "foo"
            ├── receiver: ∅
            ├── parameters:
            │   @ ParametersNode (location: (5,8)-(5,11))
            │   ├── requireds: (length: 0)
            │   ├── optionals: (length: 0)
            │   ├── rest: ∅
            │   ├── posts: (length: 0)
            │   ├── keywords: (length: 0)
            │   ├── keyword_rest:
            │   │   @ ForwardingParameterNode (location: (5,8)-(5,11))
            │   └── block: ∅
            ├── body:
            │   @ StatementsNode (location: (5,14)-(5,24))
            │   └── body: (length: 1)
            │       └── @ SuperNode (location: (5,14)-(5,24))
            │           ├── keyword_loc: (5,14)-(5,19) = "super"
            │           ├── lparen_loc: (5,19)-(5,20) = "("
            │           ├── arguments:
            │           │   @ ArgumentsNode (location: (5,20)-(5,23))
            │           │   ├── flags: ∅
            │           │   └── arguments: (length: 1)
            │           │       └── @ ForwardingArgumentsNode (location: (5,20)-(5,23))
            │           ├── rparen_loc: (5,23)-(5,24) = ")"
            │           └── block: ∅
            ├── locals: []
            ├── def_keyword_loc: (5,0)-(5,3) = "def"
            ├── operator_loc: ∅
            ├── lparen_loc: (5,7)-(5,8) = "("
            ├── rparen_loc: (5,11)-(5,12) = ")"
            ├── equal_loc: ∅
            └── end_keyword_loc: (5,26)-(5,29) = "end"