@ ProgramNode (location: (1,0)-(1,14))
├── locals: []
└── statements:
    @ StatementsNode (location: (1,0)-(1,14))
    └── body: (length: 1)
        └── @ AliasMethodNode (location: (1,0)-(1,14))
            ├── new_name:
            │   @ SymbolNode (location: (1,6)-(1,10))
            │   ├── flags: forced_us_ascii_encoding
            │   ├── opening_loc: (1,6)-(1,7) = ":"
            │   ├── value_loc: (1,7)-(1,10) = "foo"
            │   ├── closing_loc: ∅
            │   └── unescaped: "foo"
            ├── old_name:
            │   @ SymbolNode (location: (1,11)-(1,14))
            │   ├── flags: forced_us_ascii_encoding
            │   ├── opening_loc: ∅
            │   ├── value_loc: (1,11)-(1,14) = "bar"
            │   ├── closing_loc: ∅
            │   └── unescaped: "bar"
            └── keyword_loc: (1,0)-(1,5) = "alias"