@ ProgramNode (location: (1,0)-(1,4))
├── locals: []
└── statements:
    @ StatementsNode (location: (1,0)-(1,4))
    └── body: (length: 1)
        └── @ RangeNode (location: (1,0)-(1,4))
            ├── flags: ∅
            ├── left:
            │   @ IntegerNode (location: (1,0)-(1,1))
            │   ├── flags: decimal
            │   └── value: 1
            ├── right:
            │   @ IntegerNode (location: (1,3)-(1,4))
            │   ├── flags: decimal
            │   └── value: 2
            └── operator_loc: (1,1)-(1,3) = ".."