code: public ServiceFuture<ImageRegionProposal> getImageRegionProposalsAsync(UUID projectId, UUID imageId, final ServiceCallback<ImageRegionProposal> serviceCallback) {
          return ServiceFuture.fromResponse(getImageRegionProposalsWithServiceResponseAsync(projectId, imageId), serviceCallback);
      }
docs: Get region proposals for an image. Returns empty array if no proposals are found.
  This API will get region proposals for an image along with confidences for the region. It returns an empty array if no proposals are found.
  
  @param projectId The project id
  @param imageId The image id
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object