code: public List<IdentifyResult> identify(String personGroupId, List<UUID> faceIds, IdentifyOptionalParameter identifyOptionalParameter) {
          return identifyWithServiceResponseAsync(personGroupId, faceIds, identifyOptionalParameter).toBlocking().single().body();
      }
docs: Identify unknown faces from a person group.
  
  @param personGroupId PersonGroupId of the target person group, created by PersonGroups.Create
  @param faceIds Array of query faces faceIds, created by the Face - Detect. Each of the faces are identified independently. The valid number of faceIds is between [1, 10].
  @param identifyOptionalParameter the object representing the optional parameters to be set before calling this API
  @throws IllegalArgumentException thrown if parameters fail the validation
  @throws APIErrorException thrown if the request is rejected by server
  @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent
  @return the List&lt;IdentifyResult&gt; object if successful.