code: public ApiSuccessResponse hold(String id, HoldData holdData) throws ApiException {
          ApiResponse<ApiSuccessResponse> resp = holdWithHttpInfo(id, holdData);
          return resp.getData();
      }
docs: Place a call on hold
  Place the specified call on hold.
  @param id The connection ID of the call. (required)
  @param holdData Request parameters. (optional)
  @return ApiSuccessResponse
  @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body