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
public static final String ENABLED = "enabled"; 
    /**
     * Property name of an action's image (value <code>"image"</code>).
     */
    public static final String IMAGE = "image"; 
    /**
     * Property name of an action's tooltip text (value <code>"toolTipText"</code>).
     */
    public static final String TOOL_TIP_TEXT = "toolTipText"; 
    /**
     * Property name of an action's description (value <code>"description"</code>).
     * Typically the description is shown as a (longer) help text in the status line.
     */
    public static final String DESCRIPTION = "description"; 
    /**
     * Property name of an action's checked status (value
     * <code>"checked"</code>). Applicable when the style is
     * <code>AS_CHECK_BOX</code> or <code>AS_RADIO_BUTTON</code>.
     */
    public static final String CHECKED = "checked"; 
    /**
     * Property name of an action's success/fail result
     * (value <code>"result"</code>). The values are
     * <code>Boolean.TRUE</code> if running the action succeeded and 
     * <code>Boolean.FALSE</code> if running the action failed or did not
     * complete.
     * <p>
     * Not all actions report whether they succeed or fail. This property
     * is provided for use by actions that may be invoked by clients that can
     * take advantage of this information when present (for example, actions