    # File lib/fog/aws/requests/emr/modify_instance_groups.rb, line 18
            def modify_instance_groups(options={})

              if job_ids = options.delete('InstanceGroups')
                options.merge!(Fog::AWS.serialize_keys('InstanceGroups', job_ids))
              end

              request({
                'Action'  => 'ModifyInstanceGroups',
                :parser   => Fog::Parsers::AWS::EMR::ModifyInstanceGroups.new,
              }.merge(options))
            end