public com.google.storagetransfer.v1.proto.TransferTypes.NotificationConfig.EventType
                  convert(java.lang.Integer from) {
                com.google.storagetransfer.v1.proto.TransferTypes.NotificationConfig.EventType
                    result =
                        com.google.storagetransfer.v1.proto.TransferTypes.NotificationConfig
                            .EventType.forNumber(from);
                return result == null
                    ? com.google.storagetransfer.v1.proto.TransferTypes.NotificationConfig.EventType
                        .UNRECOGNIZED
                    : result;
              }
<pre>
Required. The `Topic.name` of the Pub/Sub topic to which to publish
notifications. Must be of the format: `projects/{project}/topics/{topic}`.
Not matching this format results in an
[INVALID_ARGUMENT][google.rpc.Code.INVALID_ARGUMENT] error.
</pre>

<code>string pubsub_topic = 1 [(.google.api.field_behavior) = REQUIRED];</code>

@return The bytes for pubsubTopic.
java-storage-transfer/proto-google-cloud-storage-transfer-v1/src/main/java/com/google/storagetransfer/v1/proto/TransferTypes.java