@ ProgramNode (location: (1,0)-(1,33))
├── locals: []
└── statements:
    @ StatementsNode (location: (1,0)-(1,33))
    └── body: (length: 1)
        └── @ CallNode (location: (1,0)-(1,33))
            ├── flags: ∅
            ├── receiver:
            │   @ CallNode (location: (1,0)-(1,16))
            │   ├── flags: ∅
            │   ├── receiver:
            │   │   @ CallNode (location: (1,0)-(1,1))
            │   │   ├── flags: variable_call
            │   │   ├── receiver: ∅
            │   │   ├── call_operator_loc: ∅
            │   │   ├── name: :a
            │   │   ├── message_loc: (1,0)-(1,1) = "a"
            │   │   ├── opening_loc: ∅
            │   │   ├── arguments: ∅
            │   │   ├── closing_loc: ∅
            │   │   └── block: ∅
            │   ├── call_operator_loc: (1,1)-(1,2) = "."
            │   ├── name: :b
            │   ├── message_loc: (1,2)-(1,3) = "b"
            │   ├── opening_loc: ∅
            │   ├── arguments:
            │   │   @ ArgumentsNode (location: (1,4)-(1,7))
            │   │   ├── flags: ∅
            │   │   └── arguments: (length: 1)
            │   │       └── @ CallNode (location: (1,4)-(1,7))
            │   │           ├── flags: ∅
            │   │           ├── receiver: ∅
            │   │           ├── call_operator_loc: ∅
            │   │           ├── name: :c
            │   │           ├── message_loc: (1,4)-(1,5) = "c"
            │   │           ├── opening_loc: (1,5)-(1,6) = "("
            │   │           ├── arguments: ∅
            │   │           ├── closing_loc: (1,6)-(1,7) = ")"
            │   │           └── block: ∅
            │   ├── closing_loc: ∅
            │   └── block:
            │       @ BlockNode (location: (1,8)-(1,16))
            │       ├── locals: []
            │       ├── locals_body_index: 0
            │       ├── parameters: ∅
            │       ├── body:
            │       │   @ StatementsNode (location: (1,11)-(1,12))
            │       │   └── body: (length: 1)
            │       │       └── @ CallNode (location: (1,11)-(1,12))
            │       │           ├── flags: variable_call
            │       │           ├── receiver: ∅
            │       │           ├── call_operator_loc: ∅
            │       │           ├── name: :d
            │       │           ├── message_loc: (1,11)-(1,12) = "d"
            │       │           ├── opening_loc: ∅
            │       │           ├── arguments: ∅
            │       │           ├── closing_loc: ∅
            │       │           └── block: ∅
            │       ├── opening_loc: (1,8)-(1,10) = "do"
            │       └── closing_loc: (1,13)-(1,16) = "end"
            ├── call_operator_loc: (1,16)-(1,17) = "."
            ├── name: :e
            ├── message_loc: (1,17)-(1,18) = "e"
            ├── opening_loc: ∅
            ├── arguments:
            │   @ ArgumentsNode (location: (1,19)-(1,20))
            │   ├── flags: ∅
            │   └── arguments: (length: 1)
            │       └── @ CallNode (location: (1,19)-(1,20))
            │           ├── flags: variable_call
            │           ├── receiver: ∅
            │           ├── call_operator_loc: ∅
            │           ├── name: :f
            │           ├── message_loc: (1,19)-(1,20) = "f"
            │           ├── opening_loc: ∅
            │           ├── arguments: ∅
            │           ├── closing_loc: ∅
            │           └── block: ∅
            ├── closing_loc: ∅
            └── block:
                @ BlockNode (location: (1,21)-(1,33))
                ├── locals: [:g]
                ├── locals_body_index: 1
                ├── parameters:
                │   @ BlockParametersNode (location: (1,24)-(1,27))
                │   ├── parameters:
                │   │   @ ParametersNode (location: (1,25)-(1,26))
                │   │   ├── requireds: (length: 1)
                │   │   │   └── @ RequiredParameterNode (location: (1,25)-(1,26))
                │   │   │       └── name: :g
                │   │   ├── optionals: (length: 0)
                │   │   ├── rest: ∅
                │   │   ├── posts: (length: 0)
                │   │   ├── keywords: (length: 0)
                │   │   ├── keyword_rest: ∅
                │   │   └── block: ∅
                │   ├── locals: (length: 0)
                │   ├── opening_loc: (1,24)-(1,25) = "|"
                │   └── closing_loc: (1,26)-(1,27) = "|"
                ├── body:
                │   @ StatementsNode (location: (1,28)-(1,29))
                │   └── body: (length: 1)
                │       └── @ CallNode (location: (1,28)-(1,29))
                │           ├── flags: variable_call
                │           ├── receiver: ∅
                │           ├── call_operator_loc: ∅
                │           ├── name: :h
                │           ├── message_loc: (1,28)-(1,29) = "h"
                │           ├── opening_loc: ∅
                │           ├── arguments: ∅
                │           ├── closing_loc: ∅
                │           └── block: ∅
                ├── opening_loc: (1,21)-(1,23) = "do"
                └── closing_loc: (1,30)-(1,33) = "end"
