@ ProgramNode (location: (0...9))
├── locals: []
└── statements:
    @ StatementsNode (location: (0...9))
    └── body: (length: 1)
        └── @ PostExecutionNode (location: (0...9))
            ├── statements:
            │   @ StatementsNode (location: (6...7))
            │   └── body: (length: 1)
            │       └── @ IntegerNode (location: (6...7))
            │           └── flags: decimal
            ├── keyword_loc: (0...3) = "END"
            ├── opening_loc: (4...5) = "{"
            └── closing_loc: (8...9) = "}"
