@java.lang.Override
  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
    if (((bitField0_ & 0x00000001) != 0)) {
      output.writeMessage(1, getDuration());
    }
    if (((bitField0_ & 0x00000002) != 0)) {
      output.writeMessage(2, getCompanionAds());
    }
    for (int i = 0; i < activityEvents_.size(); i++) {
      output.writeMessage(3, activityEvents_.get(i));
    }
    getUnknownFields().writeTo(output);
  }
<pre>
The list of progress tracking events for the ad break. These can be of
the following IAB types: `MUTE`, `UNMUTE`, `PAUSE`, `CLICK`,
`CLICK_THROUGH`, `REWIND`, `RESUME`, `ERROR`, `FULLSCREEN`,
`EXIT_FULLSCREEN`, `EXPAND`, `COLLAPSE`, `ACCEPT_INVITATION_LINEAR`,
`CLOSE_LINEAR`, `SKIP`.
</pre>

<code>repeated .google.cloud.video.stitcher.v1.Event activity_events = 3;</code>
java-video-stitcher/proto-google-cloud-video-stitcher-v1/src/main/java/com/google/cloud/video/stitcher/v1/VodSessionAd.java