code: public Observable<ServiceResponse<FoundFaces>> findFacesUrlInputWithServiceResponseAsync(String contentType, BodyModelModel imageUrl, FindFacesUrlInputOptionalParameter findFacesUrlInputOptionalParameter) {
          if (this.client.baseUrl() == null) {
              throw new IllegalArgumentException("Parameter this.client.baseUrl() is required and cannot be null.");
          }
          if (contentType == null) {
              throw new IllegalArgumentException("Parameter contentType is required and cannot be null.");
          }
          if (imageUrl == null) {
              throw new IllegalArgumentException("Parameter imageUrl is required and cannot be null.");
          }
          Validator.validate(imageUrl);
          final Boolean cacheImage = findFacesUrlInputOptionalParameter != null ? findFacesUrlInputOptionalParameter.cacheImage() : null;
  
          return findFacesUrlInputWithServiceResponseAsync(contentType, imageUrl, cacheImage);
      }
docs: Returns the list of faces found.
  
  @param contentType The content type.
  @param imageUrl The image url.
  @param findFacesUrlInputOptionalParameter 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 FoundFaces object