code: public Saga continueExisting(final String sagaTypeName, final SagaState state) throws ExecutionException {
          return continueSaga(sagaTypeName, state);
      }
docs: Create a new saga instance based on fully qualified name and the existing saga state.
  @throws ExecutionException Is thrown in case no provider can be found to create an instance.
  The actual cause can be inspected by {@link ExecutionException#getCause()}.