public Builder mergeSubscription(com.google.apps.events.subscriptions.v1.Subscription value) {
      if (subscriptionBuilder_ == null) {
        if (((bitField0_ & 0x00000001) != 0)
            && subscription_ != null
            && subscription_
                != com.google.apps.events.subscriptions.v1.Subscription.getDefaultInstance()) {
          getSubscriptionBuilder().mergeFrom(value);
        } else {
          subscription_ = value;
        }
      } else {
        subscriptionBuilder_.mergeFrom(value);
      }
      if (subscription_ != null) {
        bitField0_ |= 0x00000001;
        onChanged();
      }
      return this;
    }
<pre>
Required. The subscription to update.

The subscription's `name` field is used to identify the subscription to
update.
</pre>

<code>
.google.apps.events.subscriptions.v1.Subscription subscription = 1 [(.google.api.field_behavior) = REQUIRED];
</code>
java-workspaceevents/proto-google-cloud-workspaceevents-v1/src/main/java/com/google/apps/events/subscriptions/v1/UpdateSubscriptionRequest.java