Bug 71640 [IDE] use of deprecated IExtension.getDeclaringPluginDescriptor()
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/registry/Capability.java
return ""; 
        String description = element.getAttribute(ATT_DESCRIPTION);
        if (description == null)
            description = ""; 
        return description;
    }
    /**
     * Returns a list of ids of other capabilities for which this 
     * capability handles the user interface, or <code>null</code>
     * if not applicable.
     */
    public ArrayList getHandleUIs() {
        return handleUIs;
    }
    /**
     * Returns a list of ids of perspectives for which this 
     * capability wants to present as choices, or <code>null</code>
     * if not applicable.
     */
    public ArrayList getPerspectiveChoices() {
        return perspectiveChoices;
    }
    /**
     * Returns whether this capability is valid
     */
    public boolean isValid() {
        return natureDescriptor != null;
    }
}