drag and drop oddity.

I have a number of objects that handle Drops, all of their code is descended from a single object where I noticed an oddity in Drag n drop behavior. That that is, if I do not add a particular set of lines to the performDrop method, the pasteboard appears to be empty.

what gives?

Code Block 
open override func performDragOperation(_ sender: NSDraggingInfo, forCon: BKLayerController) -> Bool{
     var retVal = false
     let paneRec = forCon.rep as! CNPanelRecord
		 let pasteBoard : NSPasteboard = sender.draggingPasteboard
		if pasteBoard.types?.contains(CNDragTypeToolBox) == true{ 
					 retVal = true
					 let encoder = JSONEncoder()
					 let thePoint = CGPoint()
/* if I do not add this if statement... drag n drop does not work */
					 if let newPlistData = pasteBoard.propertyList(forType: CNDragTypeToolBox){}
      		let payload = pasteBoard.readObjects(forClasses: [pBoardNode.self], options: nil)
					let droppedItems : [CNDagObj] = (payload as! [pBoardNode]).map({$0.docNode.dagObjs}).flatMap { $0 }
					for each in droppedItems{
							each.uuid = UUID().uuidString
											do {
                            	 let ptData = try encoder.encode(thePoint)
                           	 if let env = paneRec.focus as? CNEnvelopment{
															 env.dagObjPos[each.uuid] = ptData
													 }
                        } catch  {
                            debugPrint("tring to convert a Point to a Data, in updateLayout in CDEditorDel")
                        }
                    }
                    if var env = paneRec.focus as? CNEnvelopment{
                        env.dagObjs += droppedItems
                    }
                }
                 return retVal
             }

forgive formatting and code issues. it works just fine, but I had a heck of a time fixing the formatting in the Forum editor. There's likely now, a LOT of text that used to be comments... how could that be any worse? Anyway, "if let newPlistData = pasteBoard.propertyList(forType: CNDragTypeToolBox){}" is the line. if that is not called, the drop pasteboard is empty, if it is called, my objects are there.

I don't need that object, it has nothing at all to do with anything I am doing. Why is it necessary?

also: @Apple... you really messed up the forums. this is so difficult to work with.