Bug 251257 [Contributions] IAction.setImageDescriptor() javadoc needs to note "image vs. checked" platform discrepancy
bundles/org.eclipse.jface/src/org/eclipse/jface/action/IAction.java
* does nothing.
     */
    public void run();
    /**
     * Runs this action, passing the triggering SWT event.
     * As of 2.0, <code>ActionContributionItem</code> calls this method
     * instead of <code>run()</code>.  
     * The default implementation of this method in <code>Action</code>
     * simply calls <code>run()</code> for backwards compatibility.
     * 
     * @param event the SWT event which triggered this action being run 
     * @since 2.0
     */
    public void runWithEvent(Event event);
    /**
     * Sets the action definition id of this action.
     * 
     * @param id the action definition id
     * @since 2.0
     */
    public void setActionDefinitionId(String id);
    /**
     * Sets the checked status of this action. Applicable for the styles
     * <code>AS_CHECK_BOX</code> or <code>AS_RADIO_BUTTON</code>.
     * <p>
     * Fires a property change event for the <code>CHECKED</code> property
     * if the checked status actually changes as a consequence.
     * </p>
     *
     * @param checked the new checked status