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
*            Source text.
	 * @return Escaped text.
	 */
	public static String getEscapedMenuItemText( String src )
	{
		if ( src != null && src.indexOf( '&' ) != -1 )
		{
			src = src.replaceAll( "\\&", "&&" ); 
		}
		return src;
	}
	/**
	 * Returns all font names for current system.
	 * 
	 * NOTES: Java 1.4 only support true type fonts.
	 * 
	 * @return font names.
	 */
	public static String[] getSystemFontNames( )
	{
		return getSystemFontNames( null );
	}
	/**
	 * Returns all font names for current system. NOTES: Java 1.4 only support
	 * true type fonts.
	 * 
	 * @param comparator
	 *            Sort comparator.
	 * @return font names.
	 */