@ ProgramNode (location: (0...39))
├── locals: []
└── statements:
    @ StatementsNode (location: (0...39))
    └── body: (length: 3)
        ├── @ IfNode (location: (0...13))
        │   ├── if_keyword_loc: (0...2) = "if"
        │   ├── predicate:
        │   │   @ FlipFlopNode (location: (3...7))
        │   │   ├── left:
        │   │   │   @ IntegerNode (location: (3...4))
        │   │   │   └── flags: decimal
        │   │   ├── right:
        │   │   │   @ IntegerNode (location: (6...7))
        │   │   │   └── flags: decimal
        │   │   ├── operator_loc: (4...6) = ".."
        │   │   └── flags: ∅
        │   ├── statements: ∅
        │   ├── consequent: ∅
        │   └── end_keyword_loc: (10...13) = "end"
        ├── @ IfNode (location: (14...26))
        │   ├── if_keyword_loc: (14...16) = "if"
        │   ├── predicate:
        │   │   @ FlipFlopNode (location: (17...20))
        │   │   ├── left: ∅
        │   │   ├── right:
        │   │   │   @ IntegerNode (location: (19...20))
        │   │   │   └── flags: decimal
        │   │   ├── operator_loc: (17...19) = ".."
        │   │   └── flags: ∅
        │   ├── statements: ∅
        │   ├── consequent: ∅
        │   └── end_keyword_loc: (23...26) = "end"
        └── @ IfNode (location: (27...39))
            ├── if_keyword_loc: (27...29) = "if"
            ├── predicate:
            │   @ FlipFlopNode (location: (30...33))
            │   ├── left:
            │   │   @ IntegerNode (location: (30...31))
            │   │   └── flags: decimal
            │   ├── right: ∅
            │   ├── operator_loc: (31...33) = ".."
            │   └── flags: ∅
            ├── statements: ∅
            ├── consequent: ∅
            └── end_keyword_loc: (36...39) = "end"
