@java.lang.Override
    public Builder toBuilder() {
      return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
    }
<pre>
Specifies the data and time at which Storage Transfer Service stops
listening for events from this stream. After this time, any transfers in
progress will complete, but no new transfers are initiated.
</pre>

<code>.google.protobuf.Timestamp event_stream_expiration_time = 3;</code>
java-storage-transfer/proto-google-cloud-storage-transfer-v1/src/main/java/com/google/storagetransfer/v1/proto/TransferTypes.java