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@ ProgramNode (location: (1,0)-(1,18))
├── locals: []
└── statements:
@ StatementsNode (location: (1,0)-(1,18))
└── body: (length: 1)
└── @ CallNode (location: (1,0)-(1,18))
├── receiver:
│ @ CallNode (location: (1,0)-(1,1))
│ ├── receiver: ∅
│ ├── call_operator_loc: ∅
│ ├── name: :a
│ ├── message_loc: (1,0)-(1,1) = "a"
│ ├── opening_loc: ∅
│ ├── arguments: ∅
│ ├── closing_loc: ∅
│ ├── block: ∅
│ └── flags: variable_call
├── call_operator_loc: (1,1)-(1,2) = "."
├── name: :b
├── message_loc: (1,2)-(1,3) = "b"
├── opening_loc: ∅
├── arguments: ∅
├── closing_loc: ∅
├── block:
│ @ BlockNode (location: (1,4)-(1,18))
│ ├── locals: [:c]
│ ├── parameters:
│ │ @ BlockParametersNode (location: (1,7)-(1,14))
│ │ ├── parameters: ∅
│ │ ├── locals: (length: 1)
│ │ │ └── @ BlockLocalVariableNode (location: (1,11)-(1,12))
│ │ │ └── name: :c
│ │ ├── opening_loc: (1,7)-(1,8) = "|"
│ │ └── closing_loc: (1,13)-(1,14) = "|"
│ ├── body: ∅
│ ├── opening_loc: (1,4)-(1,6) = "do"
│ ├── closing_loc: (1,15)-(1,18) = "end"
│ └── numbered_parameters: 0
└── flags: ∅
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