code: public ApiSuccessResponse complete(String mediatype, String id, CompleteData completeData) throws ApiException {
          ApiResponse<ApiSuccessResponse> resp = completeWithHttpInfo(mediatype, id, completeData);
          return resp.getData();
      }
docs: Complete an interaction
  Marks the specified interaction as complete.
  @param mediatype The media channel. (required)
  @param id The ID of the interaction to complete. (required)
  @param completeData Request parameters. (optional)
  @return ApiSuccessResponse
  @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body