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@ ProgramNode (location: (1,0)-(1,11))
├── locals: []
└── statements:
@ StatementsNode (location: (1,0)-(1,11))
└── body: (length: 1)
└── @ CallNode (location: (1,0)-(1,11))
├── receiver: ∅
├── call_operator_loc: ∅
├── message_loc: (1,0)-(1,1) = "f"
├── opening_loc: ∅
├── arguments: ∅
├── closing_loc: ∅
├── block:
│ @ BlockNode (location: (1,2)-(1,11))
│ ├── locals: [:a, :b]
│ ├── parameters:
│ │ @ BlockParametersNode (location: (1,4)-(1,9))
│ │ ├── parameters:
│ │ │ @ ParametersNode (location: (1,5)-(1,8))
│ │ │ ├── requireds: (length: 2)
│ │ │ │ ├── @ RequiredParameterNode (location: (1,5)-(1,6))
│ │ │ │ │ └── name: :a
│ │ │ │ └── @ RequiredParameterNode (location: (1,7)-(1,8))
│ │ │ │ └── name: :b
│ │ │ ├── optionals: (length: 0)
│ │ │ ├── rest: ∅
│ │ │ ├── posts: (length: 0)
│ │ │ ├── keywords: (length: 0)
│ │ │ ├── keyword_rest: ∅
│ │ │ └── block: ∅
│ │ ├── locals: (length: 0)
│ │ ├── opening_loc: (1,4)-(1,5) = "|"
│ │ └── closing_loc: (1,8)-(1,9) = "|"
│ ├── body: ∅
│ ├── opening_loc: (1,2)-(1,3) = "{"
│ └── closing_loc: (1,10)-(1,11) = "}"
├── flags: ∅
└── name: "f"
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