Bug 136256 Enhance the message builder
Please see the spec attached in 133995 for detail.
UI/org.eclipse.birt.report.designer.ui.lib.explorer/src/org/eclipse/birt/report/designer/ui/lib/explorer/action/AddSelectedLibToCurrentReportDesignAction.java
{
	private StructuredViewer viewer;
	private static final String ACTION_TEXT = Messages.getString( "UseLibraryAction.Text" ); 
	public AddSelectedLibToCurrentReportDesignAction( StructuredViewer viewer )
	{
		super( ACTION_TEXT );
		this.viewer = viewer;
	}
	public boolean isEnabled( )
	{
		LibraryHandle library = getSelectedLibrary( );
		ModuleHandle moduleHandle = SessionHandleAdapter.getInstance( )
		.getReportDesignHandle( );
		if ( library != null  && moduleHandle!=null)
		{
			return !moduleHandle.isInclude( library );
		}