import * as protos from "@google-cloud/datastore/build/protos/protos";
import { BackupOperation } from "../backups";
export declare const toISOTime: (timestamp?: protos.google.protobuf.ITimestamp | null) => string | null;
export declare const mergeExportOperation: (backupOperation: BackupOperation, exportOperation: {
    done: boolean | undefined;
    metadata: unknown | null;
    error: {
        code?: number;
        message?: string;
    } | undefined;
}) => BackupOperation;
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