@Override
    public boolean removeContent(final @NotNull Content content, final boolean dispose) {
      boolean wasSelected = mySelected == content;
      int oldIndex = myContents.indexOf(content);
      if (wasSelected) {
        removeFromSelection(content);
      }
      boolean result = myContents.remove(content);
      if (dispose) Disposer.dispose(content);
      ContentManagerEvent e = new ContentManagerEvent(this, content, oldIndex, ContentManagerEvent.ContentOperation.remove);
      myDispatcher.getMulticaster().contentRemoved(e);
      Content item = ContainerUtil.getFirstItem(myContents);
      if (item != null) {
        setSelectedContent(item);
      }
      else {
        mySelected = null;
      }
      return result;
    }
@Override
    public boolean removeContent(final @NotNull Content content, final boolean dispose)