code: public Observable<MatchResponse> matchFileInputAsync(byte[] imageStream, MatchFileInputOptionalParameter matchFileInputOptionalParameter) {
          return matchFileInputWithServiceResponseAsync(imageStream, matchFileInputOptionalParameter).map(new Func1<ServiceResponse<MatchResponse>, MatchResponse>() {
              @Override
              public MatchResponse call(ServiceResponse<MatchResponse> response) {
                  return response.body();
              }
          });
      }
docs: Fuzzily match an image against one of your custom Image Lists. You can create and manage your custom image lists using &lt;a href="/docs/services/578ff44d2703741568569ab9/operations/578ff7b12703741568569abe"&gt;this&lt;/a&gt; API.
  Returns ID and tags of matching image.&lt;br/&gt;
  &lt;br/&gt;
  Note: Refresh Index must be run on the corresponding Image List before additions and removals are reflected in the response.
  
  @param imageStream The image file.
  @param matchFileInputOptionalParameter the object representing the optional parameters to be set before calling this API
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the MatchResponse object