def get_extra_descriptor_filter(self, instance):
        return {}
returns a list of dictionaries containing GCE instance data
dataset/ETHPy150Open cloudera/hue/desktop/core/ext-py/Django-1.6.10/django/db/models/fields/related.py/ForeignObject.get_extra_descriptor_filter--crossover with--dataset/ETHPy150Open googlearchive/compute-appengine-timeout-python/main.py/list_instances