@ ProgramNode (location: (1,0)-(3,21))
├── locals: []
└── statements:
    @ StatementsNode (location: (1,0)-(3,21))
    └── body: (length: 2)
        ├── @ ForwardingSuperNode (location: (1,0)-(1,12))
        │   └── block:
        │       @ BlockNode (location: (1,6)-(1,12))
        │       ├── locals: []
        │       ├── parameters: ∅
        │       ├── body: ∅
        │       ├── opening_loc: (1,6)-(1,8) = "do"
        │       └── closing_loc: (1,9)-(1,12) = "end"
        └── @ SuperNode (location: (3,0)-(3,21))
            ├── keyword_loc: (3,0)-(3,5) = "super"
            ├── lparen_loc: ∅
            ├── arguments:
            │   @ ArgumentsNode (location: (3,6)-(3,14))
            │   ├── flags: ∅
            │   └── arguments: (length: 2)
            │       ├── @ CallNode (location: (3,6)-(3,9))
            │       │   ├── flags: variable_call, ignore_visibility
            │       │   ├── receiver: ∅
            │       │   ├── call_operator_loc: ∅
            │       │   ├── name: :foo
            │       │   ├── message_loc: (3,6)-(3,9) = "foo"
            │       │   ├── opening_loc: ∅
            │       │   ├── arguments: ∅
            │       │   ├── closing_loc: ∅
            │       │   └── block: ∅
            │       └── @ CallNode (location: (3,11)-(3,14))
            │           ├── flags: variable_call, ignore_visibility
            │           ├── receiver: ∅
            │           ├── call_operator_loc: ∅
            │           ├── name: :bar
            │           ├── message_loc: (3,11)-(3,14) = "bar"
            │           ├── opening_loc: ∅
            │           ├── arguments: ∅
            │           ├── closing_loc: ∅
            │           └── block: ∅
            ├── rparen_loc: ∅
            └── block:
                @ BlockNode (location: (3,15)-(3,21))
                ├── locals: []
                ├── parameters: ∅
                ├── body: ∅
                ├── opening_loc: (3,15)-(3,17) = "do"
                └── closing_loc: (3,18)-(3,21) = "end"
