 * Updates the action's enablement state according to the given selection. This
	 * default implementation calls one of the <code>selectionChanged</code>
	 * methods depending on the type of the passed selection.
 * Updates the action's enablement state according to the given selection. This
	 * default implementation calls one of the <code>selectionChanged</code>
	 * methods depending on the type of the passed selection. | SelectionDispatchAction.java