Bug 126658 [CommonNavigator] [DND] Complete definition of DND API
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/internal/navigator/extensions/NavigatorContentDescriptor.java
public Set getOverriddingExtensions() {
		if (overridingExtensions == null)
			overridingExtensions = new HashSet();
		return overridingExtensions;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see java.lang.Object#toString()
	 */
	public String toString() {
		return "Content[" + id + ", \"" + name + "\"]"; 
	}
	/**
	 * @return The descriptor of the <code>suppressedExtensionId</code> if
	 *         non-null.
	 */
	public INavigatorContentDescriptor getOverriddenDescriptor() {
		return overriddenDescriptor;
	}
	/**
	 * @param theOverriddenDescriptor
	 *            The overriddenDescriptor to set.
	 */
	void setOverriddenDescriptor(
			INavigatorContentDescriptor theOverriddenDescriptor) {
		overriddenDescriptor = theOverriddenDescriptor;
	}
}