@ ProgramNode (location: (1,0)-(3,15))
├── locals: [:b, :a, :c]
└── statements:
    @ StatementsNode (location: (1,0)-(3,15))
    └── body: (length: 2)
        ├── @ MultiWriteNode (location: (1,0)-(1,13))
        │   ├── lefts: (length: 1)
        │   │   └── @ MultiTargetNode (location: (1,1)-(1,6))
        │   │       ├── lefts: (length: 1)
        │   │       │   └── @ LocalVariableTargetNode (location: (1,2)-(1,3))
        │   │       │       ├── name: :b
        │   │       │       └── depth: 0
        │   │       ├── rest:
        │   │       │   @ ImplicitRestNode (location: (1,3)-(1,4))
        │   │       ├── rights: (length: 0)
        │   │       ├── lparen_loc: (1,1)-(1,2) = "("
        │   │       └── rparen_loc: (1,5)-(1,6) = ")"
        │   ├── rest: ∅
        │   ├── rights: (length: 0)
        │   ├── lparen_loc: (1,0)-(1,1) = "("
        │   ├── rparen_loc: (1,6)-(1,7) = ")"
        │   ├── operator_loc: (1,8)-(1,9) = "="
        │   └── value:
        │       @ CallNode (location: (1,10)-(1,13))
        │       ├── flags: variable_call
        │       ├── receiver: ∅
        │       ├── call_operator_loc: ∅
        │       ├── name: :foo
        │       ├── message_loc: (1,10)-(1,13) = "foo"
        │       ├── opening_loc: ∅
        │       ├── arguments: ∅
        │       ├── closing_loc: ∅
        │       └── block: ∅
        └── @ MultiWriteNode (location: (3,0)-(3,15))
            ├── lefts: (length: 2)
            │   ├── @ LocalVariableTargetNode (location: (3,0)-(3,1))
            │   │   ├── name: :a
            │   │   └── depth: 0
            │   └── @ MultiTargetNode (location: (3,3)-(3,9))
            │       ├── lefts: (length: 2)
            │       │   ├── @ LocalVariableTargetNode (location: (3,4)-(3,5))
            │       │   │   ├── name: :b
            │       │   │   └── depth: 0
            │       │   └── @ LocalVariableTargetNode (location: (3,7)-(3,8))
            │       │       ├── name: :c
            │       │       └── depth: 0
            │       ├── rest: ∅
            │       ├── rights: (length: 0)
            │       ├── lparen_loc: (3,3)-(3,4) = "("
            │       └── rparen_loc: (3,8)-(3,9) = ")"
            ├── rest: ∅
            ├── rights: (length: 0)
            ├── lparen_loc: ∅
            ├── rparen_loc: ∅
            ├── operator_loc: (3,10)-(3,11) = "="
            └── value:
                @ CallNode (location: (3,12)-(3,15))
                ├── flags: variable_call
                ├── receiver: ∅
                ├── call_operator_loc: ∅
                ├── name: :foo
                ├── message_loc: (3,12)-(3,15) = "foo"
                ├── opening_loc: ∅
                ├── arguments: ∅
                ├── closing_loc: ∅
                └── block: ∅
