NSDraggingImageComponentKey

Key with a corresponding value that is an image of the item being dragged.

Key with a corresponding value that represents a textual label associate with the item, for example, a file name.

Returns an array of dragging image components that are used to create the drag image.

An array of blocks that provide the dragging image components.

Returns the pasteboard reader or writer object dependent on the context of where this dragging item is used .