DSL EXPRESSION:
1 !=~ 2 !=~ 3


AST:
"block" [tt:block] [nt:StatementBlock]
    "!=~" [tt:op_negtilde] [nt:BareBoolean]
        "!=~" [tt:op_negtilde] [nt:Operator]
            "!=~" [tt:op_negtilde] [nt:Operator]
                "1" [tt:int_literal] [nt:int_literal]
                "2" [tt:int_literal] [nt:int_literal]
            "3" [tt:int_literal] [nt:int_literal]

