def populate(self):
        self._registry = {}
        
        for provider_class in self._registered_providers:
            instance = provider_class()
            self._registry[instance] = instance.regex
        
        for stored_provider in StoredProvider.objects.active():
            self._registry[stored_provider] = stored_provider.regex
        
        self._populated = True
Get the value of the :class:`AttrSpec` associated with `spec_name`.
dataset/ETHPy150Open worldcompany/djangoembed/oembed/sites.py/ProviderSite.populate--crossover with--dataset/ETHPy150Open bokeh/bokeh/bokeh/charts/data_source.py/DataGroup.__getitem__