"block" [tt:block] [nt:StatementBlock]
    "=" [tt:equals] [nt:Assignment]
        "y" [tt:non_sigil_name] [nt:LocalVariable]
        "+" [tt:op_plus] [nt:Operator]
            "x" [tt:non_sigil_name] [nt:LocalVariable]
            "1" [tt:int_literal] [nt:int_literal]
