@ ProgramNode (location: (1,0)-(4,4))
├── locals: []
└── statements:
    @ StatementsNode (location: (1,0)-(4,4))
    └── body: (length: 4)
        ├── @ FalseNode (location: (1,0)-(1,5))
        ├── @ NilNode (location: (2,0)-(2,3))
        ├── @ SelfNode (location: (3,0)-(3,4))
        └── @ TrueNode (location: (4,0)-(4,4))
