@ ProgramNode (location: (0...9))
├── locals: []
└── statements:
    @ StatementsNode (location: (0...9))
    └── body: (length: 1)
        └── @ ConstantPathAndWriteNode (location: (0...9))
            ├── target:
            │   @ ConstantPathNode (location: (0...3))
            │   ├── parent: ∅
            │   ├── child:
            │   │   @ ConstantReadNode (location: (2...3))
            │   │   └── name: :X
            │   └── delimiter_loc: (0...2) = "::"
            ├── operator_loc: (4...7) = "&&="
            └── value:
                @ IntegerNode (location: (8...9))
                └── flags: decimal
