code: public ApiResponse<ApiSuccessResponse> mergeWithHttpInfo(String id, MergeData mergeData) throws ApiException {
          com.squareup.okhttp.Call call = mergeValidateBeforeCall(id, mergeData, null, null);
          Type localVarReturnType = new TypeToken<ApiSuccessResponse>(){}.getType();
          return apiClient.execute(call, localVarReturnType);
      }
docs: Merge two calls
  Merge the two specified calls.
  @param id The connection ID of the first call to be merged. (required)
  @param mergeData  (required)
  @return ApiResponse&lt;ApiSuccessResponse&gt;
  @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body