code: protected Observable<RxComapiClient> getClientInstance(@NonNull Application app, @NonNull final ChatConfig chatConfig) {
          return RxComapi.initialise(app, chatConfig.buildComapiConfig());
      }
docs: Initialise and obtain Foundation SDK client.
  
  @param app        Application instance.
  @param chatConfig Chat SDK configuration.
  @return Observable returning Comapi Foundation Client instance.