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