@ ProgramNode (location: (0...12))
├── locals: []
└── statements:
    @ StatementsNode (location: (0...12))
    └── body: (length: 1)
        └── @ ConstantPathOrWriteNode (location: (0...12))
            ├── target:
            │   @ ConstantPathNode (location: (0...6))
            │   ├── parent:
            │   │   @ ConstantPathNode (location: (0...3))
            │   │   ├── parent: ∅
            │   │   ├── child:
            │   │   │   @ ConstantReadNode (location: (2...3))
            │   │   │   └── name: :X
            │   │   └── delimiter_loc: (0...2) = "::"
            │   ├── child:
            │   │   @ ConstantReadNode (location: (5...6))
            │   │   └── name: :Y
            │   └── delimiter_loc: (3...5) = "::"
            ├── operator_loc: (7...10) = "||="
            └── value:
                @ IntegerNode (location: (11...12))
                └── flags: decimal
