@ ProgramNode (location: (1,0)-(5,2))
├── locals: []
└── statements:
    @ StatementsNode (location: (1,0)-(5,2))
    └── body: (length: 3)
        ├── @ IntegerNode (location: (1,0)-(1,3))
        │   ├── flags: decimal
        │   └── value: 42
        ├── @ IntegerNode (location: (3,0)-(3,3))
        │   ├── flags: decimal
        │   └── value: -42
        └── @ IntegerNode (location: (5,0)-(5,2))
            ├── flags: decimal
            └── value: 42