@ ProgramNode (location: (1,0)-(5,7))
├── locals: [:a]
└── statements:
    @ StatementsNode (location: (1,0)-(5,7))
    └── body: (length: 3)
        ├── @ LocalVariableAndWriteNode (location: (1,0)-(1,7))
        │   ├── name_loc: (1,0)-(1,1) = "a"
        │   ├── operator_loc: (1,2)-(1,5) = "&&="
        │   ├── value:
        │   │   @ CallNode (location: (1,6)-(1,7))
        │   │   ├── flags: variable_call
        │   │   ├── receiver: ∅
        │   │   ├── call_operator_loc: ∅
        │   │   ├── name: :b
        │   │   ├── message_loc: (1,6)-(1,7) = "b"
        │   │   ├── opening_loc: ∅
        │   │   ├── arguments: ∅
        │   │   ├── closing_loc: ∅
        │   │   └── block: ∅
        │   ├── name: :a
        │   └── depth: 0
        ├── @ LocalVariableOperatorWriteNode (location: (3,0)-(3,6))
        │   ├── name_loc: (3,0)-(3,1) = "a"
        │   ├── operator_loc: (3,2)-(3,4) = "+="
        │   ├── value:
        │   │   @ CallNode (location: (3,5)-(3,6))
        │   │   ├── flags: variable_call
        │   │   ├── receiver: ∅
        │   │   ├── call_operator_loc: ∅
        │   │   ├── name: :b
        │   │   ├── message_loc: (3,5)-(3,6) = "b"
        │   │   ├── opening_loc: ∅
        │   │   ├── arguments: ∅
        │   │   ├── closing_loc: ∅
        │   │   └── block: ∅
        │   ├── name: :a
        │   ├── operator: :+
        │   └── depth: 0
        └── @ LocalVariableOrWriteNode (location: (5,0)-(5,7))
            ├── name_loc: (5,0)-(5,1) = "a"
            ├── operator_loc: (5,2)-(5,5) = "||="
            ├── value:
            │   @ CallNode (location: (5,6)-(5,7))
            │   ├── flags: variable_call
            │   ├── receiver: ∅
            │   ├── call_operator_loc: ∅
            │   ├── name: :b
            │   ├── message_loc: (5,6)-(5,7) = "b"
            │   ├── opening_loc: ∅
            │   ├── arguments: ∅
            │   ├── closing_loc: ∅
            │   └── block: ∅
            ├── name: :a
            └── depth: 0
