docs: public void marshall(AddThingToThingGroupRequest addThingToThingGroupRequest, ProtocolMarshaller protocolMarshaller) {
  
          if (addThingToThingGroupRequest == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(addThingToThingGroupRequest.getThingGroupName(), THINGGROUPNAME_BINDING);
              protocolMarshaller.marshall(addThingToThingGroupRequest.getThingGroupArn(), THINGGROUPARN_BINDING);
              protocolMarshaller.marshall(addThingToThingGroupRequest.getThingName(), THINGNAME_BINDING);
              protocolMarshaller.marshall(addThingToThingGroupRequest.getThingArn(), THINGARN_BINDING);
              protocolMarshaller.marshall(addThingToThingGroupRequest.getOverrideDynamicGroups(), OVERRIDEDYNAMICGROUPS_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }