Bug 63420 [R21PRES] Flash on tab switch
bundles/org.eclipse.ui.presentations.r21/src/org/eclipse/ui/internal/presentations/R21EditorStackPresentation.java
* @param presentablePart
	 * @return an image
	 */
	Image getLabelImage(IPresentablePart presentablePart) {
		return presentablePart.getTitleImage();
	}
	/**
	 * Returns the tool tip text used for the tab item
	 * 
	 * @param presentablePart
	 * @return a tool tip text
	 */
	String getLabelToolTipText(IPresentablePart presentablePart) {
		return presentablePart.getTitleToolTip();
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.internal.skins.StackPresentation#addPart(org.eclipse.ui.internal.skins.IPresentablePart,
	 *      org.eclipse.ui.internal.skins.IPresentablePart)
	 */
	public void addPart(IPresentablePart newPart, Object cookie) {
		int idx;
		if (cookie instanceof Integer) {
			idx = ((Integer) cookie).intValue();
		} else {
			
			idx = tabFolder.getItemCount();
		}
		addPart(newPart, idx);