code: public ApiResponse<ApiSuccessResponse> alternateWithHttpInfo(String id, AlternateData alternateData) throws ApiException {
          com.squareup.okhttp.Call call = alternateValidateBeforeCall(id, alternateData, null, null);
          Type localVarReturnType = new TypeToken<ApiSuccessResponse>(){}.getType();
          return apiClient.execute(call, localVarReturnType);
      }
docs: Alternate between calls
  Alternate two calls so that you retrieve a call on hold and place the established call on hold instead. This is a shortcut for doing [/voice/calls/{id}/hold](/reference/workspace/Voice/index.html#hold) and [/voice/calls/{id}/retrieve](/reference/workspace/Voice/index.html#retrieve) separately.
  @param id The connection ID of the established call that should be placed on hold. (required)
  @param alternateData  (required)
  @return ApiResponse&lt;ApiSuccessResponse&gt;
  @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body