</a></code>, will have a uniuqe ID
this  will be  extracted  from that object to to uniuqely identify it. If <code><a href="../Classes/DiskStorage.html">DiskStorage</a></code> is usedit  will
use that key to  generate a uniqe path to the object in the storage, also in the other storages will
be used as amunique identifier</p>
<div class="aside aside-throws">
    <p class="aside-title">Throws</p>
    Error encountered during the saving process (e.g. Path incorrect, or Encoding falied).

</div>

             