@ ProgramNode (location: (1,0)-(1,14))
├── flags: ∅
├── locals: []
└── statements:
    @ StatementsNode (location: (1,0)-(1,14))
    ├── flags: ∅
    └── body: (length: 1)
        └── @ CallNode (location: (1,0)-(1,14))
            ├── flags: newline, ignore_visibility
            ├── receiver: ∅
            ├── call_operator_loc: ∅
            ├── name: :p
            ├── message_loc: (1,0)-(1,1) = "p"
            ├── opening_loc: ∅
            ├── arguments: ∅
            ├── closing_loc: ∅
            └── block:
                @ BlockNode (location: (1,2)-(1,14))
                ├── flags: ∅
                ├── locals: [:_1]
                ├── parameters:
                │   @ NumberedParametersNode (location: (1,2)-(1,14))
                │   ├── flags: ∅
                │   └── maximum: 1
                ├── body:
                │   @ StatementsNode (location: (1,4)-(1,12))
                │   ├── flags: ∅
                │   └── body: (length: 1)
                │       └── @ ArrayNode (location: (1,4)-(1,12))
                │           ├── flags: newline
                │           ├── elements: (length: 1)
                │           │   └── @ CallNode (location: (1,5)-(1,11))
                │           │       ├── flags: ∅
                │           │       ├── receiver:
                │           │       │   @ LocalVariableReadNode (location: (1,5)-(1,7))
                │           │       │   ├── flags: ∅
                │           │       │   ├── name: :_1
                │           │       │   └── depth: 0
                │           │       ├── call_operator_loc: ∅
                │           │       ├── name: :**
                │           │       ├── message_loc: (1,8)-(1,10) = "**"
                │           │       ├── opening_loc: ∅
                │           │       ├── arguments:
                │           │       │   @ ArgumentsNode (location: (1,10)-(1,11))
                │           │       │   ├── flags: ∅
                │           │       │   └── arguments: (length: 1)
                │           │       │       └── @ IntegerNode (location: (1,10)-(1,11))
                │           │       │           ├── flags: static_literal, decimal
                │           │       │           └── value: 2
                │           │       ├── closing_loc: ∅
                │           │       └── block: ∅
                │           ├── opening_loc: (1,4)-(1,5) = "["
                │           └── closing_loc: (1,11)-(1,12) = "]"
                ├── opening_loc: (1,2)-(1,3) = "{"
                └── closing_loc: (1,13)-(1,14) = "}"
