@ ProgramNode (location: (1,0)-(5,5))
├── locals: []
└── statements:
    @ StatementsNode (location: (1,0)-(5,5))
    └── body: (length: 3)
        ├── @ LambdaNode (location: (1,0)-(1,8))
        │   ├── locals: []
        │   ├── operator_loc: (1,0)-(1,2) = "->"
        │   ├── opening_loc: (1,5)-(1,6) = "{"
        │   ├── closing_loc: (1,7)-(1,8) = "}"
        │   ├── parameters:
        │   │   @ BlockParametersNode (location: (1,3)-(1,4))
        │   │   ├── parameters:
        │   │   │   @ ParametersNode (location: (1,3)-(1,4))
        │   │   │   ├── requireds: (length: 0)
        │   │   │   ├── optionals: (length: 0)
        │   │   │   ├── rest:
        │   │   │   │   @ RestParameterNode (location: (1,3)-(1,4))
        │   │   │   │   ├── flags: ∅
        │   │   │   │   ├── name: ∅
        │   │   │   │   ├── name_loc: ∅
        │   │   │   │   └── operator_loc: (1,3)-(1,4) = "*"
        │   │   │   ├── posts: (length: 0)
        │   │   │   ├── keywords: (length: 0)
        │   │   │   ├── keyword_rest: ∅
        │   │   │   └── block: ∅
        │   │   ├── locals: (length: 0)
        │   │   ├── opening_loc: ∅
        │   │   └── closing_loc: ∅
        │   └── body: ∅
        ├── @ LambdaNode (location: (3,0)-(3,9))
        │   ├── locals: []
        │   ├── operator_loc: (3,0)-(3,2) = "->"
        │   ├── opening_loc: (3,3)-(3,5) = "do"
        │   ├── closing_loc: (3,6)-(3,9) = "end"
        │   ├── parameters: ∅
        │   └── body: ∅
        └── @ LambdaNode (location: (5,0)-(5,5))
            ├── locals: []
            ├── operator_loc: (5,0)-(5,2) = "->"
            ├── opening_loc: (5,2)-(5,3) = "{"
            ├── closing_loc: (5,4)-(5,5) = "}"
            ├── parameters: ∅
            └── body: ∅