etag property

An opaque tag indicating the current version of the Policy, used for concurrency control.

When the Policy is returned from either a GetPolicy or a ListOrgPolicy request, this etag indicates the version of the current Policy to use when executing a read-modify-write loop. When the Policy is returned from a GetEffectivePolicy request, the etag will be unset. When the Policy is used in a SetOrgPolicy method, use the etag value that was returned from a GetOrgPolicy request as part of a read-modify-write loop for concurrency control. Not setting the etagin a SetOrgPolicy request will result in an unconditional write of the Policy.