Bug 198089 [ToolTips] Open/Add new API for ToolTips
- don't make shouldCreateToolTip final - add new API method ColumnViewerToolTipSupport#createToolTipContentArea(Event, Object, Composite) - Allow DefaultToolTips displayed more than once (For ToolTips in ToolTips).
bundles/org.eclipse.jface/src/org/eclipse/jface/window/ToolTip.java
toolTipHookBothRecursively(children[i]);
			}
		}
	}
	/**
	 * Creates the content area of the the tooltip.
	 *
	 * @param event
	 *            the event that triggered the activation of the tooltip
	 * @param parent
	 *            the parent of the content area
	 * @return the content area created
	 */
	protected abstract Composite createToolTipContentArea(Event event,
			Composite parent);
	/**
	 * This method is called after a Tooltip is hidden.
	 * <p>
	 * <b>Subclasses may override to clean up requested system resources</b>
	 * </p>
	 *
	 * @param event
	 *            event triggered the hiding action (may be <code>null</code>
	 *            if event wasn't triggered by user actions directly)
	 */
	protected void afterHideToolTip(Event event) {
	}
	/**
	 * Set the hide delay.
	 *