def volume_admin_metadata_update(context, volume_id, metadata, delete, add=True, update=True):
 return IMPL.volume_admin_metadata_update(context, volume_id, metadata, delete, add, update)

def volume_admin_metadata_update ( context , volume_id , metadata , delete , add = True , update = True ) : return IMPL . volume_admin_metadata_update ( context , volume_id , metadata , delete , add , update )
update metadata if it exists .