code: @Override
      public ModifyDBParameterGroupResult modifyDBParameterGroup(ModifyDBParameterGroupRequest request) {
          request = beforeClientExecution(request);
          return executeModifyDBParameterGroup(request);
      }
docs: <p>
  Modifies the parameters of a DB parameter group. To modify more than one parameter, submit a list of the
  following: <code>ParameterName</code>, <code>ParameterValue</code>, and <code>ApplyMethod</code>. A maximum of 20
  parameters can be modified in a single request.
  </p>
  <note>
  <p>
  Changes to dynamic parameters are applied immediately. Changes to static parameters require a reboot without
  failover to the DB instance associated with the parameter group before the change can take effect.
  </p>
  </note> <important>
  <p>
  After you modify a DB parameter group, you should wait at least 5 minutes before creating your first DB instance
  that uses that DB parameter group as the default parameter group. This allows Amazon Neptune to fully complete
  the modify action before the parameter group is used as the default for a new DB instance. This is especially
  important for parameters that are critical when creating the default database for a DB instance, such as the
  character set for the default database defined by the <code>character_set_database</code> parameter. You can use
  the <i>Parameter Groups</i> option of the Amazon Neptune console or the <i>DescribeDBParameters</i> command to
  verify that your DB parameter group has been created or modified.
  </p>
  </important>
  
  @param modifyDBParameterGroupRequest
  @return Result of the ModifyDBParameterGroup operation returned by the service.
  @throws DBParameterGroupNotFoundException
  <i>DBParameterGroupName</i> does not refer to an existing DB parameter group.
  @throws InvalidDBParameterGroupStateException
  The DB parameter group is in use or is in an invalid state. If you are attempting to delete the parameter
  group, you cannot delete it when the parameter group is in this state.
  @sample AmazonNeptune.ModifyDBParameterGroup
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/neptune-2014-10-31/ModifyDBParameterGroup" target="_top">AWS
  API Documentation</a>