@ ProgramNode (location: (0...51))
├── locals: []
└── statements:
    @ StatementsNode (location: (0...51))
    └── body: (length: 6)
        ├── @ RedoNode (location: (0...4))
        ├── @ RetryNode (location: (6...11))
        ├── @ SelfNode (location: (13...17))
        ├── @ SourceEncodingNode (location: (19...31))
        ├── @ SourceFileNode (location: (33...41))
        │   └── filepath: "keywords.txt"
        └── @ SourceLineNode (location: (43...51))
