23 drag drop

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2. & 3. & . 4. & . . (Dragging Pasteboard) 5. & . . (Dragging Pasteboard) . 6. & . . (Dragging Pasteboard) . . 7. & 23 & 8. Copy & Paste . . . . . 9. . draggingSourceOperationMaskForLocal: . isLocal - / 10. . , . . 11. 12. 13. 14. 15. 16. 17. () . , NSDragOperationDelete . 18. & 19. NSDragginInfo . 20. draggingEntered: draggingUpdated: draggingExited: prepareForDragOperation: performDragOperation: concludeDragOperation: & 21. 22. draggingEntered: draggingUpdated: draggingExited: prepareForDragOperation: performDragOperation: concludeDragOperation: & 23. , , .