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@ ProgramNode (location: (1,0)-(1,14))
├── locals: []
└── statements:
@ StatementsNode (location: (1,0)-(1,14))
└── body: (length: 1)
└── @ CallNode (location: (1,0)-(1,14))
├── receiver:
│ @ CallNode (location: (1,0)-(1,12))
│ ├── receiver:
│ │ @ CallNode (location: (1,0)-(1,1))
│ │ ├── receiver: ∅
│ │ ├── call_operator_loc: ∅
│ │ ├── message_loc: (1,0)-(1,1) = "a"
│ │ ├── opening_loc: ∅
│ │ ├── arguments: ∅
│ │ ├── closing_loc: ∅
│ │ ├── block: ∅
│ │ ├── flags: variable_call
│ │ └── name: "a"
│ ├── call_operator_loc: (1,1)-(1,2) = "."
│ ├── message_loc: (1,2)-(1,3) = "b"
│ ├── opening_loc: ∅
│ ├── arguments:
│ │ @ ArgumentsNode (location: (1,4)-(1,5))
│ │ └── arguments: (length: 1)
│ │ └── @ CallNode (location: (1,4)-(1,5))
│ │ ├── receiver: ∅
│ │ ├── call_operator_loc: ∅
│ │ ├── message_loc: (1,4)-(1,5) = "c"
│ │ ├── opening_loc: ∅
│ │ ├── arguments: ∅
│ │ ├── closing_loc: ∅
│ │ ├── block: ∅
│ │ ├── flags: variable_call
│ │ └── name: "c"
│ ├── closing_loc: ∅
│ ├── block:
│ │ @ BlockNode (location: (1,6)-(1,12))
│ │ ├── locals: []
│ │ ├── parameters: ∅
│ │ ├── body: ∅
│ │ ├── opening_loc: (1,6)-(1,8) = "do"
│ │ └── closing_loc: (1,9)-(1,12) = "end"
│ ├── flags: ∅
│ └── name: "b"
├── call_operator_loc: (1,12)-(1,13) = "."
├── message_loc: (1,13)-(1,14) = "d"
├── opening_loc: ∅
├── arguments: ∅
├── closing_loc: ∅
├── block: ∅
├── flags: ∅
└── name: "d"
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