code: def AddFileWithUnknownHash(client_path, blob_refs, use_external_stores=True):
    
    precondition.AssertType(client_path, db.ClientPath)
    precondition.AssertIterableType(blob_refs, rdf_objects.BlobReference)
    return AddFilesWithUnknownHashes(
        {client_path: blob_refs},
        use_external_stores=use_external_stores)[client_path]
docs: Add a new file consisting of given blob IDs.