@ ProgramNode (location: (1,0)-(3,20))
├── flags: ∅
├── locals: []
└── statements:
    @ StatementsNode (location: (1,0)-(3,20))
    ├── flags: ∅
    └── body: (length: 2)
        ├── @ ModuleNode (location: (1,0)-(1,17))
        │   ├── flags: newline
        │   ├── locals: []
        │   ├── module_keyword_loc: (1,0)-(1,6) = "module"
        │   ├── constant_path:
        │   │   @ ConstantPathNode (location: (1,7)-(1,12))
        │   │   ├── flags: ∅
        │   │   ├── parent: ∅
        │   │   ├── name: :Foo
        │   │   ├── delimiter_loc: (1,7)-(1,9) = "::"
        │   │   └── name_loc: (1,9)-(1,12) = "Foo"
        │   ├── body: ∅
        │   ├── end_keyword_loc: (1,14)-(1,17) = "end"
        │   └── name: :Foo
        └── @ ModuleNode (location: (3,0)-(3,20))
            ├── flags: newline
            ├── locals: []
            ├── module_keyword_loc: (3,0)-(3,6) = "module"
            ├── constant_path:
            │   @ ConstantPathNode (location: (3,7)-(3,15))
            │   ├── flags: ∅
            │   ├── parent:
            │   │   @ ConstantReadNode (location: (3,7)-(3,10))
            │   │   ├── flags: ∅
            │   │   └── name: :Bar
            │   ├── name: :Foo
            │   ├── delimiter_loc: (3,10)-(3,12) = "::"
            │   └── name_loc: (3,12)-(3,15) = "Foo"
            ├── body: ∅
            ├── end_keyword_loc: (3,17)-(3,20) = "end"
            └── name: :Foo
