@ ProgramNode (location: (1,0)-(1,9))
├── locals: []
└── statements:
    @ StatementsNode (location: (1,0)-(1,9))
    └── body: (length: 1)
        └── @ StringNode (location: (1,0)-(1,9))
            ├── flags: ∅
            ├── opening_loc: (1,0)-(1,9) = "<<OOTPÜT"
            ├── content_loc: (2,0)-(3,0) = ".\n"
            ├── closing_loc: (3,0)-(4,0) = "OOTPÜT\n"
            └── unescaped: ".\n"