@ ProgramNode (location: (1,0)-(1,9))
├── locals: []
└── statements:
    @ StatementsNode (location: (1,0)-(1,9))
    └── body: (length: 1)
        └── @ CallNode (location: (1,0)-(1,9))
            ├── flags: ignore_visibility
            ├── receiver: ∅
            ├── call_operator_loc: ∅
            ├── name: :p
            ├── message_loc: (1,0)-(1,1) = "p"
            ├── opening_loc: ∅
            ├── arguments:
            │   @ ArgumentsNode (location: (1,2)-(1,9))
            │   ├── flags: ∅
            │   └── arguments: (length: 1)
            │       └── @ RangeNode (location: (1,2)-(1,9))
            │           ├── flags: ∅
            │           ├── left:
            │           │   @ ParenthesesNode (location: (1,2)-(1,4))
            │           │   ├── body: ∅
            │           │   ├── opening_loc: (1,2)-(1,3) = "("
            │           │   └── closing_loc: (1,3)-(1,4) = ")"
            │           ├── right:
            │           │   @ NilNode (location: (1,6)-(1,9))
            │           └── operator_loc: (1,4)-(1,6) = ".."
            ├── closing_loc: ∅
            └── block: ∅