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@ ProgramNode (location: (1,0)-(1,13))
├── locals: []
└── statements:
@ StatementsNode (location: (1,0)-(1,13))
└── body: (length: 1)
└── @ CallNode (location: (1,0)-(1,13))
├── receiver: ∅
├── call_operator_loc: ∅
├── message_loc: (1,0)-(1,6) = "lambda"
├── opening_loc: ∅
├── arguments: ∅
├── closing_loc: ∅
├── block:
│ @ BlockNode (location: (1,6)-(1,13))
│ ├── locals: [:a]
│ ├── parameters:
│ │ @ BlockParametersNode (location: (1,7)-(1,11))
│ │ ├── parameters: ∅
│ │ ├── locals: (length: 1)
│ │ │ └── @ BlockLocalVariableNode (location: (1,9)-(1,10))
│ │ │ └── name: :a
│ │ ├── opening_loc: (1,7)-(1,8) = "|"
│ │ └── closing_loc: (1,10)-(1,11) = "|"
│ ├── body:
│ │ @ StatementsNode (location: (1,11)-(1,12))
│ │ └── body: (length: 1)
│ │ └── @ LocalVariableReadNode (location: (1,11)-(1,12))
│ │ ├── name: :a
│ │ └── depth: 0
│ ├── opening_loc: (1,6)-(1,7) = "{"
│ └── closing_loc: (1,12)-(1,13) = "}"
├── flags: ∅
└── name: "lambda"
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