@ ProgramNode (location: (1,0)-(1,12))
├── locals: [:a, :b, :c]
└── statements:
    @ StatementsNode (location: (1,0)-(1,12))
    └── body: (length: 1)
        └── @ MultiWriteNode (location: (1,0)-(1,12))
            ├── lefts: (length: 1)
            │   └── @ LocalVariableTargetNode (location: (1,0)-(1,1))
            │       ├── name: :a
            │       └── depth: 0
            ├── rest:
            │   @ SplatNode (location: (1,3)-(1,5))
            │   ├── operator_loc: (1,3)-(1,4) = "*"
            │   └── expression:
            │       @ LocalVariableTargetNode (location: (1,4)-(1,5))
            │       ├── name: :b
            │       └── depth: 0
            ├── rights: (length: 1)
            │   └── @ LocalVariableTargetNode (location: (1,7)-(1,8))
            │       ├── name: :c
            │       └── depth: 0
            ├── lparen_loc: ∅
            ├── rparen_loc: ∅
            ├── operator_loc: (1,9)-(1,10) = "="
            └── value:
                @ CallNode (location: (1,11)-(1,12))
                ├── flags: variable_call, ignore_visibility
                ├── receiver: ∅
                ├── call_operator_loc: ∅
                ├── name: :d
                ├── message_loc: (1,11)-(1,12) = "d"
                ├── opening_loc: ∅
                ├── arguments: ∅
                ├── closing_loc: ∅
                └── block: ∅