@ ProgramNode (location: (1,0)-(11,8))
├── locals: []
└── statements:
    @ StatementsNode (location: (1,0)-(11,8))
    └── body: (length: 6)
        ├── @ RedoNode (location: (1,0)-(1,4))
        ├── @ RetryNode (location: (3,0)-(3,5))
        ├── @ SelfNode (location: (5,0)-(5,4))
        ├── @ SourceEncodingNode (location: (7,0)-(7,12))
        ├── @ SourceFileNode (location: (9,0)-(9,8))
        │   └── filepath: "keywords.txt"
        └── @ SourceLineNode (location: (11,0)-(11,8))