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@ ProgramNode (location: (1,0)-(1,13))
├── locals: [:a, :b]
└── statements:
@ StatementsNode (location: (1,0)-(1,13))
└── body: (length: 1)
└── @ CallNode (location: (1,0)-(1,13))
├── flags: ∅
├── receiver:
│ @ ParenthesesNode (location: (1,1)-(1,13))
│ ├── body:
│ │ @ StatementsNode (location: (1,2)-(1,12))
│ │ └── body: (length: 1)
│ │ └── @ MultiWriteNode (location: (1,2)-(1,12))
│ │ ├── lefts: (length: 2)
│ │ │ ├── @ LocalVariableTargetNode (location: (1,2)-(1,3))
│ │ │ │ ├── name: :a
│ │ │ │ └── depth: 0
│ │ │ └── @ LocalVariableTargetNode (location: (1,5)-(1,6))
│ │ │ ├── name: :b
│ │ │ └── depth: 0
│ │ ├── rest: ∅
│ │ ├── rights: (length: 0)
│ │ ├── lparen_loc: ∅
│ │ ├── rparen_loc: ∅
│ │ ├── operator_loc: (1,7)-(1,8) = "="
│ │ └── value:
│ │ @ CallNode (location: (1,9)-(1,12))
│ │ ├── flags: variable_call, ignore_visibility
│ │ ├── receiver: ∅
│ │ ├── call_operator_loc: ∅
│ │ ├── name: :foo
│ │ ├── message_loc: (1,9)-(1,12) = "foo"
│ │ ├── opening_loc: ∅
│ │ ├── arguments: ∅
│ │ ├── closing_loc: ∅
│ │ └── block: ∅
│ ├── opening_loc: (1,1)-(1,2) = "("
│ └── closing_loc: (1,12)-(1,13) = ")"
├── call_operator_loc: ∅
├── name: :!
├── message_loc: (1,0)-(1,1) = "!"
├── opening_loc: ∅
├── arguments: ∅
├── closing_loc: ∅
└── block: ∅
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