@ ProgramNode (location: (0...31))
├── locals: []
└── statements:
    @ StatementsNode (location: (0...31))
    └── body: (length: 2)
        ├── @ AliasGlobalVariableNode (location: (0...15))
        │   ├── new_name:
        │   │   @ GlobalVariableReadNode (location: (6...10))
        │   │   └── name: :$foo
        │   ├── old_name:
        │   │   @ GlobalVariableReadNode (location: (11...15))
        │   │   └── name: :$bar
        │   └── keyword_loc: (0...5) = "alias"
        └── @ AliasMethodNode (location: (16...31))
            ├── new_name:
            │   @ SymbolNode (location: (22...26))
            │   ├── opening_loc: (22...23) = ":"
            │   ├── value_loc: (23...26) = "foo"
            │   ├── closing_loc: ∅
            │   └── unescaped: "foo"
            ├── old_name:
            │   @ SymbolNode (location: (27...31))
            │   ├── opening_loc: (27...28) = ":"
            │   ├── value_loc: (28...31) = "bar"
            │   ├── closing_loc: ∅
            │   └── unescaped: "bar"
            └── keyword_loc: (16...21) = "alias"
