Instance of :class:`eulfedora.api.ResourceIndex`, with the same root url and credentials

def risearch(self):
        "Instance of :class:`eulfedora.api.ResourceIndex`, with the same root url and credentials"
        if self._risearch is None:
            self._risearch = ResourceIndex(self.api.base_url, self.api.username, self.api.password)
        return self._risearch