presto-main/src/main/java/io/prestosql/type/ColorOperators.java/ColorOperators/notEqual
class ColorOperators:    @ScalarOperator(NOT_EQUAL)
    @SqlType(StandardTypes.BOOLEAN)
    @SqlNullable
    public static Boolean notEqual(@SqlType(ColorType.NAME) long left, @SqlType(ColorType.NAME) long right)
    {
        return left != right;
    }