code: @SuppressWarnings("deprecation")
      @Override
      public List<Action> getActions() {
          // add all the transient actions, too
          List<Action> actions = new Vector<Action>(super.getActions());
          actions.addAll(transientActions);
          // return the read only list to cause a failure on plugins who try to add an action here
          return Collections.unmodifiableList(actions);
      }
docs: {@inheritDoc}
  
  <p>
  Note that this method returns a read-only view of {@link Action}s.
  {@link BuildStep}s and others who want to add a project action
  should do so by implementing {@link BuildStep#getProjectActions(AbstractProject)}.
  
  @see TransientProjectActionFactory