def _refresh_group_nodes(self):
# Coalesce multiple refreshes that happen in succession
if self._group_nodes_need_updating:
return
else:
self._group_nodes_need_updating = True
fg_call_later(self._refresh_group_nodes_now, force=True)
def bg_task():
# Link parsing is I/O intensive, so do it on a background thread
self.resource_links = revision.links()
fg_call_later(self.update_children)
