Bug 167545 Copy a cascading parameter group and paste it to another parameter group causes an exception thrown
Steps to reproduce: 1.Copy a cascading parameter group using short cut key "Ctrl+x"/"Ctrl+c", or choosing context menu "Cut"/"Copy"; 2.Paste it to another parameter group using short cut key "Ctrl+v", or choosing context menu "Paste"; Expected result: The source one is pasted in the destination. Actual result: An exception thrown org.eclipse.birt.report.model.api.command.ContentException: The Cascading Parameter Group("Source") is not allowed in the slot (parameters) of Parameter Group("Destination").
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/DEUtil.java
*/
	public static List getMethods( IClassInfo classInfo, Comparator comp )
	{
		List methods = classInfo.getMethods( );
		Collections.sort( methods, comp );
		return methods;
	}
	/**
	 * Get members with default comparator
	 * 
	 * @param classInfo
	 * @return List of members
	 */
	public static List getMembers( IClassInfo classInfo )
	{
		return getMembers( classInfo, new AlphabeticallyComparator( ) );
	}
	/**
	 * Get members with specified comparator
	 * 
	 * @param classInfo
	 * @param comp
	 *            The comparator
	 * @return List of methods
	 */
	public static List getMembers( IClassInfo classInfo, Comparator comp )
	{
		List members = classInfo.getMembers( );
		Collections.sort( members, comp );
		return members;