@ ProgramNode (location: (1,0)-(1,5))
├── locals: []
└── statements:
    @ StatementsNode (location: (1,0)-(1,5))
    └── body: (length: 1)
        └── @ ConstantPathNode (location: (1,0)-(1,5))
            ├── parent: ∅
            ├── child:
            │   @ ConstantReadNode (location: (1,2)-(1,5))
            │   └── name: :Foo
            └── delimiter_loc: (1,0)-(1,2) = "::"