gtk-tree-drag-source-row-draggable (source path)

source -- a gtk-tree-drag-source object
path -- a gtk-tree-path instance with the row on which user is initiating a drag

True if the row can be dragged.

Asks the gtk-tree-drag-source object whether a particular row can be used as the source of a DND operation. If the source does not implement this interface, the row is assumed draggable.