@ ProgramNode (location: (1,0)-(1,19))
├── locals: []
└── statements:
    @ StatementsNode (location: (1,0)-(1,19))
    └── body: (length: 2)
        ├── @ LambdaNode (location: (1,0)-(1,12))
        │   ├── locals: [:scope]
        │   ├── operator_loc: (1,0)-(1,2) = "->"
        │   ├── opening_loc: (1,10)-(1,11) = "{"
        │   ├── closing_loc: (1,11)-(1,12) = "}"
        │   ├── parameters:
        │   │   @ BlockParametersNode (location: (1,2)-(1,9))
        │   │   ├── parameters:
        │   │   │   @ ParametersNode (location: (1,3)-(1,8))
        │   │   │   ├── requireds: (length: 1)
        │   │   │   │   └── @ RequiredParameterNode (location: (1,3)-(1,8))
        │   │   │   │       ├── flags: ∅
        │   │   │   │       └── name: :scope
        │   │   │   ├── optionals: (length: 0)
        │   │   │   ├── rest: ∅
        │   │   │   ├── posts: (length: 0)
        │   │   │   ├── keywords: (length: 0)
        │   │   │   ├── keyword_rest: ∅
        │   │   │   └── block: ∅
        │   │   ├── locals: (length: 0)
        │   │   ├── opening_loc: (1,2)-(1,3) = "("
        │   │   └── closing_loc: (1,8)-(1,9) = ")"
        │   └── body: ∅
        └── @ CallNode (location: (1,14)-(1,19))
            ├── flags: variable_call, ignore_visibility
            ├── receiver: ∅
            ├── call_operator_loc: ∅
            ├── name: :scope
            ├── message_loc: (1,14)-(1,19) = "scope"
            ├── opening_loc: ∅
            ├── arguments: ∅
            ├── closing_loc: ∅
            └── block: ∅