@ ProgramNode (location: (1,0)-(1,3))
├── locals: []
└── statements:
    @ StatementsNode (location: (1,0)-(1,3))
    └── body: (length: 1)
        └── @ SymbolNode (location: (1,0)-(1,3))
            ├── flags: forced_us_ascii_encoding
            ├── opening_loc: (1,0)-(1,2) = ":'"
            ├── value_loc: (1,2)-(1,2) = ""
            ├── closing_loc: (1,2)-(1,3) = "'"
            └── unescaped: ""