code: <T extends RxComapiClient> Observable<T> initialise(@NonNull final Application application, CallbackAdapter adapter, @NonNull final T instance) {
          return super.initialise(application, instance, adapter);
      }
docs: Initialise ComapiImpl client instance.
  
  @param application Application context.
  @param adapter     Observables to callbacks adapter.
  @return Observable returning client instance.