Bug 122869 Drag a parameter from data explorer view into a table in library, a new parameter is created automatically.
Description:Drag a parameter from data explorer view into a table in library, a new parameter is created automatically. Steps to reproduce: 1. Add a cascading parameter and a table in a library file. 2. Drag a parameter from data explorer view into a table cell in layout editor. 3. Find that a new parameter was added in data explorer view automatically.
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/DEUtil.java
* 
	 * @param handle
	 * @return
	 */
	public static boolean isIncluded( LibraryHandle handle )
	{
		return handle.getNamespace( ) != null;
	}
	public static List getClasses( )
	{
		return getClasses( new AlphabeticallyComparator( ) );
	}
	public static List getClasses( Comparator comp )
	{
		List classes = DesignEngine.getMetaDataDictionary( ).getClasses( );
		Collections.sort( classes, comp );
		return classes;
	}
	public static List getMethods( IClassInfo classInfo )
	{
		return getMethods( classInfo, new AlphabeticallyComparator( ) );
	}
	public static List getMethods( IClassInfo classInfo, Comparator comp )
	{
		List methods = classInfo.getMethods( );
		Collections.sort( methods, comp );
		return methods;
	}
	public static List getMembers( IClassInfo classInfo )
	{