@ ProgramNode (location: (0...32))
├── locals: []
└── statements:
    @ StatementsNode (location: (0...32))
    └── body: (length: 2)
        ├── @ CallNode (location: (0...18))
        │   ├── receiver: ∅
        │   ├── call_operator_loc: ∅
        │   ├── message_loc: (0...1) = "m"
        │   ├── opening_loc: ∅
        │   ├── arguments: ∅
        │   ├── closing_loc: ∅
        │   ├── block:
        │   │   @ BlockNode (location: (2...18))
        │   │   ├── locals: [:foo, :bar]
        │   │   ├── parameters:
        │   │   │   @ BlockParametersNode (location: (4...16))
        │   │   │   ├── parameters:
        │   │   │   │   @ ParametersNode (location: (5...15))
        │   │   │   │   ├── requireds: (length: 1)
        │   │   │   │   │   └── @ RequiredDestructuredParameterNode (location: (5...15))
        │   │   │   │   │       ├── parameters: (length: 2)
        │   │   │   │   │       │   ├── @ RequiredParameterNode (location: (6...9))
        │   │   │   │   │       │   │   └── name: :foo
        │   │   │   │   │       │   └── @ RequiredParameterNode (location: (11...14))
        │   │   │   │   │       │       └── name: :bar
        │   │   │   │   │       ├── opening_loc: (5...6) = "("
        │   │   │   │   │       └── closing_loc: (14...15) = ")"
        │   │   │   │   ├── optionals: (length: 0)
        │   │   │   │   ├── rest: ∅
        │   │   │   │   ├── posts: (length: 0)
        │   │   │   │   ├── keywords: (length: 0)
        │   │   │   │   ├── keyword_rest: ∅
        │   │   │   │   └── block: ∅
        │   │   │   ├── locals: (length: 0)
        │   │   │   ├── opening_loc: (4...5) = "|"
        │   │   │   └── closing_loc: (15...16) = "|"
        │   │   ├── body: ∅
        │   │   ├── opening_loc: (2...3) = "{"
        │   │   └── closing_loc: (17...18) = "}"
        │   ├── flags: ∅
        │   └── name: "m"
        └── @ CallNode (location: (21...32))
            ├── receiver: ∅
            ├── call_operator_loc: ∅
            ├── message_loc: (21...22) = "m"
            ├── opening_loc: ∅
            ├── arguments: ∅
            ├── closing_loc: ∅
            ├── block:
            │   @ BlockNode (location: (23...32))
            │   ├── locals: [:foo]
            │   ├── parameters:
            │   │   @ BlockParametersNode (location: (25...30))
            │   │   ├── parameters:
            │   │   │   @ ParametersNode (location: (26...29))
            │   │   │   ├── requireds: (length: 1)
            │   │   │   │   └── @ RequiredParameterNode (location: (26...29))
            │   │   │   │       └── name: :foo
            │   │   │   ├── optionals: (length: 0)
            │   │   │   ├── rest: ∅
            │   │   │   ├── posts: (length: 0)
            │   │   │   ├── keywords: (length: 0)
            │   │   │   ├── keyword_rest: ∅
            │   │   │   └── block: ∅
            │   │   ├── locals: (length: 0)
            │   │   ├── opening_loc: (25...26) = "|"
            │   │   └── closing_loc: (29...30) = "|"
            │   ├── body: ∅
            │   ├── opening_loc: (23...24) = "{"
            │   └── closing_loc: (31...32) = "}"
            ├── flags: ∅
            └── name: "m"
