IElementDefn toAdd )
int slotId, DesignElement toAdd )
	public List validateForAdding( Module module, DesignElement element,			IElementDefn toAdd )	{		ElementDefn listingDefn = (ElementDefn) MetaDataDictionary				.getInstance( ).getElement( ReportDesignConstants.LISTING_ITEM );		if ( !listingDefn.isKindOf( toAdd ) )			return Collections.EMPTY_LIST;		return doValidate( module, element, DesignElement.NO_SLOT );	}