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@ ProgramNode (location: (1,0)-(5,13))
├── locals: []
└── statements:
@ StatementsNode (location: (1,0)-(5,13))
└── body: (length: 3)
├── @ DefinedNode (location: (1,0)-(1,13))
│ ├── lparen_loc: ∅
│ ├── value:
│ │ @ InstanceVariableReadNode (location: (1,9)-(1,13))
│ │ └── name: :@foo
│ ├── rparen_loc: ∅
│ └── keyword_loc: (1,0)-(1,8) = "defined?"
├── @ DefinedNode (location: (3,0)-(3,12))
│ ├── lparen_loc: ∅
│ ├── value:
│ │ @ CallNode (location: (3,9)-(3,12))
│ │ ├── flags: variable_call, ignore_visibility
│ │ ├── receiver: ∅
│ │ ├── call_operator_loc: ∅
│ │ ├── name: :foo
│ │ ├── message_loc: (3,9)-(3,12) = "foo"
│ │ ├── opening_loc: ∅
│ │ ├── arguments: ∅
│ │ ├── closing_loc: ∅
│ │ └── block: ∅
│ ├── rparen_loc: ∅
│ └── keyword_loc: (3,0)-(3,8) = "defined?"
└── @ DefinedNode (location: (5,0)-(5,13))
├── lparen_loc: (5,8)-(5,9) = "("
├── value:
│ @ CallNode (location: (5,9)-(5,12))
│ ├── flags: variable_call, ignore_visibility
│ ├── receiver: ∅
│ ├── call_operator_loc: ∅
│ ├── name: :foo
│ ├── message_loc: (5,9)-(5,12) = "foo"
│ ├── opening_loc: ∅
│ ├── arguments: ∅
│ ├── closing_loc: ∅
│ └── block: ∅
├── rparen_loc: (5,12)-(5,13) = ")"
└── keyword_loc: (5,0)-(5,8) = "defined?"
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