docs: public Observable<EntityRole> getCompositeEntityRoleAsync(UUID appId, String versionId, UUID cEntityId, UUID roleId) {
          return getCompositeEntityRoleWithServiceResponseAsync(appId, versionId, cEntityId, roleId).map(new Func1<ServiceResponse<EntityRole>, EntityRole>() {
              @Override
              public EntityRole call(ServiceResponse<EntityRole> response) {
                  return response.body();
              }
          });
      }