def METHOD_NAME(self, filename, chunk_size=100, limit_to_db=None,
            already_exported=None, force=False):
    if not self.domain:
        raise ExportError("Must specify domain")
    if not force and os.path.exists(filename):
        raise ExportError(
            "{} exporter doesn't support resume. "
            "To re-run the export use 'reset'".format(self.slug)
        )
    migrator = BlobDbBackendExporter(filename, already_exported)
    with migrator:
        self._migrate(migrator, chunk_size, limit_to_db)
    print("Processed {} {} objects".format(migrator.total_blobs, self.slug))
    return migrator.total_blobs, 0