def __init__(self, documentcloud_pages=[], *args, **kwargs):
        self.documentcloud_pages = documentcloud_pages
        super(DocumentCloudMixin, self).__init__(*args, **kwargs)
Overrides the standard __init__ to add our documentcloud_page_urls
dataset/ETHPy150Open california-civic-data-coalition/django-calaccess-raw-data/calaccess_raw/fields.py/DocumentCloudMixin.__init__