message: fixes sink drag and drop on knative service
diff: @@ -245,14 +245,14 @@ const graphEventSourceDropTargetSpec: DropTargetSpec<
  accept: [CREATE_CONNECTOR_DROP_TYPE, MOVE_EV_SRC_CONNECTOR_DROP_TYPE],
  canDrop: (item, monitor, props) => {
  return (
  - monitor.getOperation() === MOVE_EV_SRC_CONNECTOR_DROP_TYPE &&
  + monitor.getItemType() === MOVE_EV_SRC_CONNECTOR_DROP_TYPE &&
  item.getSource() !== props.element
  );
  },
  collect: (monitor, props) => ({
  canDrop:
  monitor.isDragging() &&
  - monitor.getOperation() === MOVE_EV_SRC_CONNECTOR_DROP_TYPE &&
  + monitor.getItemType() === MOVE_EV_SRC_CONNECTOR_DROP_TYPE &&
  monitor.canDrop(),
  dropTarget: monitor.isOver({ shallow: true }),
  edgeDragging: nodesEdgeIsDragging(monitor, props),
  