presto-hive/src/main/java/io/prestosql/plugin/hive/security/SqlStandardAccessControlMetadata.java/SqlStandardAccessControlMetadata/checkRoleIsNotReserved
class SqlStandardAccessControlMetadata:    private static void checkRoleIsNotReserved(String role)
    {
        // roles are case insensitive in Hive
        if (RESERVED_ROLES.contains(role.toLowerCase(ENGLISH))) {
            throw new PrestoException(ALREADY_EXISTS, "Role name cannot be one of the reserved roles: " + RESERVED_ROLES);
        }
    }