@ ProgramNode (location: (0...63))
├── locals: [:foo]
└── statements:
    @ StatementsNode (location: (0...63))
    └── body: (length: 3)
        ├── @ MultiWriteNode (location: (0...17))
        │   ├── targets: (length: 2)
        │   │   ├── @ CallNode (location: (0...6))
        │   │   │   ├── receiver:
        │   │   │   │   @ SelfNode (location: (0...4))
        │   │   │   ├── call_operator_loc: (4...5) = "."
        │   │   │   ├── message_loc: (5...6) = "A"
        │   │   │   ├── opening_loc: ∅
        │   │   │   ├── arguments: ∅
        │   │   │   ├── closing_loc: ∅
        │   │   │   ├── block: ∅
        │   │   │   ├── flags: ∅
        │   │   │   └── name: "A="
        │   │   └── @ LocalVariableTargetNode (location: (8...11))
        │   │       ├── name: :foo
        │   │       └── depth: 0
        │   ├── lparen_loc: ∅
        │   ├── rparen_loc: ∅
        │   ├── operator_loc: (12...13) = "="
        │   └── value:
        │       @ LocalVariableReadNode (location: (14...17))
        │       ├── name: :foo
        │       └── depth: 0
        ├── @ MultiWriteNode (location: (19...43))
        │   ├── targets: (length: 2)
        │   │   ├── @ CallNode (location: (19...25))
        │   │   │   ├── receiver:
        │   │   │   │   @ SelfNode (location: (19...23))
        │   │   │   ├── call_operator_loc: (23...24) = "."
        │   │   │   ├── message_loc: (24...25) = "a"
        │   │   │   ├── opening_loc: ∅
        │   │   │   ├── arguments: ∅
        │   │   │   ├── closing_loc: ∅
        │   │   │   ├── block: ∅
        │   │   │   ├── flags: ∅
        │   │   │   └── name: "a="
        │   │   └── @ CallNode (location: (27...37))
        │   │       ├── receiver:
        │   │       │   @ SelfNode (location: (27...31))
        │   │       ├── call_operator_loc: ∅
        │   │       ├── message_loc: (31...37) = "[1, 2]"
        │   │       ├── opening_loc: (31...32) = "["
        │   │       ├── arguments:
        │   │       │   @ ArgumentsNode (location: (32...36))
        │   │       │   └── arguments: (length: 2)
        │   │       │       ├── @ IntegerNode (location: (32...33))
        │   │       │       │   └── flags: decimal
        │   │       │       └── @ IntegerNode (location: (35...36))
        │   │       │           └── flags: decimal
        │   │       ├── closing_loc: (36...37) = "]"
        │   │       ├── block: ∅
        │   │       ├── flags: ∅
        │   │       └── name: "[]="
        │   ├── lparen_loc: ∅
        │   ├── rparen_loc: ∅
        │   ├── operator_loc: (38...39) = "="
        │   └── value:
        │       @ LocalVariableReadNode (location: (40...43))
        │       ├── name: :foo
        │       └── depth: 0
        └── @ MultiWriteNode (location: (45...63))
            ├── targets: (length: 2)
            │   ├── @ CallNode (location: (45...52))
            │   │   ├── receiver:
            │   │   │   @ SelfNode (location: (45...49))
            │   │   ├── call_operator_loc: (49...51) = "::"
            │   │   ├── message_loc: (51...52) = "a"
            │   │   ├── opening_loc: ∅
            │   │   ├── arguments: ∅
            │   │   ├── closing_loc: ∅
            │   │   ├── block: ∅
            │   │   ├── flags: ∅
            │   │   └── name: "a="
            │   └── @ LocalVariableTargetNode (location: (54...57))
            │       ├── name: :foo
            │       └── depth: 0
            ├── lparen_loc: ∅
            ├── rparen_loc: ∅
            ├── operator_loc: (58...59) = "="
            └── value:
                @ LocalVariableReadNode (location: (60...63))
                ├── name: :foo
                └── depth: 0
