Output Only The state of the subnetwork, which can be one of READY or
DRAINING. A subnetwork that is READY is ready to be used. The state of
DRAINING is only applicable to subnetworks that have the purpose set to
INTERNAL_HTTPS_LOAD_BALANCER and indicates that connections to the load
balancer are being drained. A subnetwork that is draining cannot be used
or modified until it reaches a status of READY.
Possible string values are: