code: @Override
      public UpdateParameterGroupResult updateParameterGroup(UpdateParameterGroupRequest request) {
          request = beforeClientExecution(request);
          return executeUpdateParameterGroup(request);
      }
docs: <p>
  Modifies the parameters of a parameter group. You can modify up to 20 parameters in a single request by
  submitting a list parameter name and value pairs.
  </p>
  
  @param updateParameterGroupRequest
  @return Result of the UpdateParameterGroup operation returned by the service.
  @throws InvalidParameterGroupStateException
  One or more parameters in a parameter group are in an invalid state.
  @throws ParameterGroupNotFoundException
  The specified parameter group does not exist.
  @throws ServiceLinkedRoleNotFoundException
  @throws InvalidParameterValueException
  The value for a parameter is invalid.
  @throws InvalidParameterCombinationException
  Two or more incompatible parameters were specified.
  @sample AmazonDax.UpdateParameterGroup
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/dax-2017-04-19/UpdateParameterGroup" target="_top">AWS API
  Documentation</a>