@ ProgramNode (location: (1,0)-(1,15))
├── locals: [:s, :x, :y, :z]
└── statements:
    @ StatementsNode (location: (1,0)-(1,15))
    └── body: (length: 1)
        └── @ MultiWriteNode (location: (1,0)-(1,15))
            ├── lefts: (length: 0)
            ├── rest:
            │   @ SplatNode (location: (1,0)-(1,2))
            │   ├── operator_loc: (1,0)-(1,1) = "*"
            │   └── expression:
            │       @ LocalVariableTargetNode (location: (1,1)-(1,2))
            │       ├── name: :s
            │       └── depth: 0
            ├── rights: (length: 3)
            │   ├── @ LocalVariableTargetNode (location: (1,4)-(1,5))
            │   │   ├── name: :x
            │   │   └── depth: 0
            │   ├── @ LocalVariableTargetNode (location: (1,7)-(1,8))
            │   │   ├── name: :y
            │   │   └── depth: 0
            │   └── @ LocalVariableTargetNode (location: (1,10)-(1,11))
            │       ├── name: :z
            │       └── depth: 0
            ├── lparen_loc: ∅
            ├── rparen_loc: ∅
            ├── operator_loc: (1,12)-(1,13) = "="
            └── value:
                @ CallNode (location: (1,14)-(1,15))
                ├── flags: variable_call, ignore_visibility
                ├── receiver: ∅
                ├── call_operator_loc: ∅
                ├── name: :f
                ├── message_loc: (1,14)-(1,15) = "f"
                ├── opening_loc: ∅
                ├── arguments: ∅
                ├── closing_loc: ∅
                └── block: ∅