docs: public File downloadFileFromResponse(Response response) throws ApiException {
          try {
              File file = prepareDownloadFile(response);
              BufferedSink sink = Okio.buffer(Okio.sink(file));
              sink.writeAll(response.body().source());
              sink.close();
              return file;
          } catch (IOException e) {
              throw new ApiException(e);
          }
      }