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
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 * Copyright (c) 2006, 2007 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
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 * Contributors:
 *     Tom Schindl <tom.schindl@bestsolution.at> - initial API and implementation
 *                                                 bugfix in: 195137
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