@ ProgramNode (location: (1,0)-(1,10))
├── locals: []
└── statements:
    @ StatementsNode (location: (1,0)-(1,10))
    └── body: (length: 1)
        └── @ ConstantPathOrWriteNode (location: (1,0)-(1,10))
            ├── target:
            │   @ ConstantPathNode (location: (1,0)-(1,4))
            │   ├── parent:
            │   │   @ ConstantReadNode (location: (1,0)-(1,1))
            │   │   └── name: :X
            │   ├── child:
            │   │   @ ConstantReadNode (location: (1,3)-(1,4))
            │   │   └── name: :Y
            │   └── delimiter_loc: (1,1)-(1,3) = "::"
            ├── operator_loc: (1,5)-(1,8) = "||="
            └── value:
                @ IntegerNode (location: (1,9)-(1,10))
                ├── flags: decimal
                └── value: 1