Bug 258736 [Viewers] [JFace] setUseHashLookUp() and multiple occurrences of same domain object in TreeViewer
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/TreeViewer.java
}
	/**
	 * Create a new ViewerRow at rowIndex
	 *
	 * @param parent
	 * @param style
	 * @param rowIndex
	 * @return ViewerRow
	 */
	private ViewerRow createNewRowPart(ViewerRow parent, int style, int rowIndex) {
		if (parent == null) {
			if (rowIndex >= 0) {
				return getViewerRowFromItem(new TreeItem(tree, style, rowIndex));
			}
			return getViewerRowFromItem(new TreeItem(tree, style));
		}
		if (rowIndex >= 0) {
			return getViewerRowFromItem(new TreeItem((TreeItem) parent.getItem(),
					SWT.NONE, rowIndex));
		}
		return getViewerRowFromItem(new TreeItem((TreeItem) parent.getItem(),
				SWT.NONE));
	}
	/*
	 * (non-Javadoc)
	 *
	 * @see org.eclipse.jface.viewers.AbstractTreeViewer#internalInitializeTree(org.eclipse.swt.widgets.Control)
	 */
	protected void internalInitializeTree(Control widget) {
		if (contentProviderIsLazy) {