if (result) {
        executionList.execute();
      }
      return result;
    }

    /**
     * Subclasses should invoke this method to set the result of the computation to an error, {@code
     * throwable}. This will set the state of the future to {@link OldAbstractFuture.Sync#COMPLETED}
     * and invoke the listeners if the state was successfully changed.
     *