def uris(self):
        """All unique media file identifiers corresponding to streams in this
        collection.
        """
        _uris = []
        for stream in self._element_id_to_element.values():
            _uris.extend(stream.uris)
        return list(set(_uris))
All unique media file identifiers corresponding to streams in this
        collection.
        
fiftyone/utils/openlabel.py