1. DomName('DataTransfer.setDragImage')
  2. DocsEditable()
  3. Experimental()
void setDragImage(Element image, int x, int y)

Source 

@DomName('DataTransfer.setDragImage')
@DocsEditable()
@Experimental() // untriaged
void setDragImage(Element image, int x, int y) => _blink.BlinkDataTransfer.instance.setDragImage_Callback_3_(this, image, x, y);