gtk:tree-drag-source-drag-data-get (source path)

source -- a gtk:tree-drag-source object
path -- a gtk:tree-path insance with the row that was dragged

The gdk:content-provider instance for the given path or nil if none exists.

Asks the gtk:tree-drag-source object to return a gdk:content-provider object representing the row at path. Should robustly handle a path no longer found in the model. The gtk:tree-drag-source implementation is deprecated since 4.10. Use list models instead.