code: def _export_module_attachments(meta_graph):
    
    added_attachments = tf_v1.get_collection(_ATTACHMENT_COLLECTION_INTERNAL)
    if not added_attachments: return  # Don't touch `meta_graph`.
    unique_attachments = collections.OrderedDict(  # Avoid indeterminism.
        (attachment.key, attachment)
        for attachment in added_attachments)
    meta_graph.collection_def[ATTACHMENT_COLLECTION_SAVED].bytes_list.value[:] = [
        attachment.SerializeToString()
        for attachment in unique_attachments.values()]
docs: Exports ModuleAttachments from the current tf.Graph into `meta_graph`.