def mimeData(self, items):
"""
"""
mime_data = QTreeWidget.mimeData(self, items)
encoded_data = QByteArray()
stream = QDataStream(encoded_data, QIODevice.WriteOnly)
for item in items:
layer_mime_data = item.item_data.layer_mime_data()
stream.writeQString(layer_mime_data)
mime_data.setData(self.QGIS_URI_MIME, encoded_data)
return mime_data
