@ ProgramNode (location: (1,0)-(1,16))
├── locals: []
└── statements:
    @ StatementsNode (location: (1,0)-(1,16))
    └── body: (length: 1)
        └── @ CallNode (location: (1,0)-(1,16))
            ├── flags: ∅
            ├── receiver: ∅
            ├── call_operator_loc: ∅
            ├── name: :f
            ├── message_loc: (1,0)-(1,1) = "f"
            ├── opening_loc: ∅
            ├── arguments:
            │   @ ArgumentsNode (location: (1,2)-(1,16))
            │   ├── flags: ∅
            │   └── arguments: (length: 1)
            │       └── @ ParenthesesNode (location: (1,2)-(1,16))
            │           ├── body:
            │           │   @ StatementsNode (location: (1,3)-(1,15))
            │           │   └── body: (length: 1)
            │           │       └── @ RescueModifierNode (location: (1,3)-(1,15))
            │           │           ├── expression:
            │           │           │   @ CallNode (location: (1,3)-(1,4))
            │           │           │   ├── flags: variable_call
            │           │           │   ├── receiver: ∅
            │           │           │   ├── call_operator_loc: ∅
            │           │           │   ├── name: :g
            │           │           │   ├── message_loc: (1,3)-(1,4) = "g"
            │           │           │   ├── opening_loc: ∅
            │           │           │   ├── arguments: ∅
            │           │           │   ├── closing_loc: ∅
            │           │           │   └── block: ∅
            │           │           ├── keyword_loc: (1,5)-(1,11) = "rescue"
            │           │           └── rescue_expression:
            │           │               @ NilNode (location: (1,12)-(1,15))
            │           ├── opening_loc: (1,2)-(1,3) = "("
            │           └── closing_loc: (1,15)-(1,16) = ")"
            ├── closing_loc: ∅
            └── block: ∅
