Bug 174701 [Viewers] ViewerRow should be reused instead of connected to the Item
Currently we create a ViewerRow ver every Item we create this can degrade performance, we should cache the row and reuse it
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/ColumnViewer.java
*/
	protected void hookEditingSupport(Control control) {
		
		
		
		
		if (viewerEditor != null) {
			control.addMouseListener(new MouseAdapter() {
				public void mouseDown(MouseEvent e) {
					handleMouseDown(e);
				}
			});
		}
	}
	/**
	 * Creates the viewer editor used for editing cell contents. To be
	 * implemented by subclasses.
	 * 
	 * @return the editor, or <code>null</code> if this viewer does not
	 *         support editing cell contents.
	 */
	protected abstract ColumnViewerEditor createViewerEditor();
	/**
	 * Returns the viewer cell at the given widget-relative coordinates, or
	 * <code>null</code> if there is no cell at that location
	 * 
	 * @param point
	 *            the widget-relative coordinates
	 * @return the cell or <code>null</code> if no cell is found at the given
	 *         point