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@ ProgramNode (location: (1,0)-(1,20))
├── locals: []
└── statements:
@ StatementsNode (location: (1,0)-(1,20))
└── body: (length: 1)
└── @ ClassNode (location: (1,0)-(1,20))
├── locals: []
├── class_keyword_loc: (1,0)-(1,5) = "class"
├── constant_path:
│ @ ConstantReadNode (location: (1,6)-(1,9))
│ └── name: :Foo
├── inheritance_operator_loc: (1,10)-(1,11) = "<"
├── superclass:
│ @ CallNode (location: (1,12)-(1,15))
│ ├── flags: ignore_visibility
│ ├── receiver: ∅
│ ├── call_operator_loc: ∅
│ ├── name: :a
│ ├── message_loc: (1,12)-(1,13) = "a"
│ ├── opening_loc: ∅
│ ├── arguments:
│ │ @ ArgumentsNode (location: (1,13)-(1,15))
│ │ ├── flags: ∅
│ │ └── arguments: (length: 1)
│ │ └── @ SymbolNode (location: (1,13)-(1,15))
│ │ ├── flags: forced_us_ascii_encoding
│ │ ├── opening_loc: (1,13)-(1,14) = ":"
│ │ ├── value_loc: (1,14)-(1,15) = "b"
│ │ ├── closing_loc: ∅
│ │ └── unescaped: "b"
│ ├── closing_loc: ∅
│ └── block: ∅
├── body: ∅
├── end_keyword_loc: (1,17)-(1,20) = "end"
└── name: :Foo
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