docs: public Observable<VirtualMachineExtensionImageInner> getAsync(String location, String publisherName, String type, String version) {
          return getWithServiceResponseAsync(location, publisherName, type, version).map(new Func1<ServiceResponse<VirtualMachineExtensionImageInner>, VirtualMachineExtensionImageInner>() {
              @Override
              public VirtualMachineExtensionImageInner call(ServiceResponse<VirtualMachineExtensionImageInner> response) {
                  return response.body();
              }
          });
      }