google.golang.org/grpc/internal/balancer/gracefulswitch.Balancer.UpdateSubConnState (method, view implemented interface methods)

one use

	google.golang.org/grpc/internal/balancer/gracefulswitch (current package)
		gracefulswitch.go#L261: func (gsb *Balancer) UpdateSubConnState(sc balancer.SubConn, state balancer.SubConnState) {