code: @Override
      public RemoveRoleFromDBInstanceResult removeRoleFromDBInstance(RemoveRoleFromDBInstanceRequest request) {
          request = beforeClientExecution(request);
          return executeRemoveRoleFromDBInstance(request);
      }
docs: <p>
  Disassociates an AWS Identity and Access Management (IAM) role from a DB instance.
  </p>
  
  @param removeRoleFromDBInstanceRequest
  @return Result of the RemoveRoleFromDBInstance operation returned by the service.
  @throws DBInstanceNotFoundException
  <i>DBInstanceIdentifier</i> doesn't refer to an existing DB instance.
  @throws DBInstanceRoleNotFoundException
  The specified <i>RoleArn</i> value doesn't match the specifed feature for the DB instance.
  @throws InvalidDBInstanceStateException
  The DB instance isn't in a valid state.
  @sample AmazonRDS.RemoveRoleFromDBInstance
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/rds-2014-10-31/RemoveRoleFromDBInstance" target="_top">AWS
  API Documentation</a>