@ ProgramNode (location: (1,0)-(5,10))
├── flags: ∅
├── locals: []
└── statements:
    @ StatementsNode (location: (1,0)-(5,10))
    ├── flags: ∅
    └── body: (length: 3)
        ├── @ SuperNode (location: (1,0)-(1,9))
        │   ├── flags: newline
        │   ├── keyword_loc: (1,0)-(1,5) = "super"
        │   ├── lparen_loc: ∅
        │   ├── arguments:
        │   │   @ ArgumentsNode (location: (1,6)-(1,9))
        │   │   ├── flags: ∅
        │   │   └── arguments: (length: 1)
        │   │       └── @ CallNode (location: (1,6)-(1,9))
        │   │           ├── flags: variable_call, ignore_visibility
        │   │           ├── receiver: ∅
        │   │           ├── call_operator_loc: ∅
        │   │           ├── name: :foo
        │   │           ├── message_loc: (1,6)-(1,9) = "foo"
        │   │           ├── opening_loc: ∅
        │   │           ├── arguments: ∅
        │   │           ├── closing_loc: ∅
        │   │           └── block: ∅
        │   ├── rparen_loc: ∅
        │   └── block: ∅
        ├── @ SuperNode (location: (3,0)-(3,7))
        │   ├── flags: newline
        │   ├── keyword_loc: (3,0)-(3,5) = "super"
        │   ├── lparen_loc: (3,5)-(3,6) = "("
        │   ├── arguments: ∅
        │   ├── rparen_loc: (3,6)-(3,7) = ")"
        │   └── block: ∅
        └── @ SuperNode (location: (5,0)-(5,10))
            ├── flags: newline
            ├── keyword_loc: (5,0)-(5,5) = "super"
            ├── lparen_loc: (5,5)-(5,6) = "("
            ├── arguments:
            │   @ ArgumentsNode (location: (5,6)-(5,9))
            │   ├── flags: ∅
            │   └── arguments: (length: 1)
            │       └── @ CallNode (location: (5,6)-(5,9))
            │           ├── flags: variable_call, ignore_visibility
            │           ├── receiver: ∅
            │           ├── call_operator_loc: ∅
            │           ├── name: :foo
            │           ├── message_loc: (5,6)-(5,9) = "foo"
            │           ├── opening_loc: ∅
            │           ├── arguments: ∅
            │           ├── closing_loc: ∅
            │           └── block: ∅
            ├── rparen_loc: (5,9)-(5,10) = ")"
            └── block: ∅
