public com.google.protobuf.Duration.Builder getOffsetBuilder() {
      bitField0_ |= 0x00000008;
      onChanged();
      return getOffsetFieldBuilder().getBuilder();
    }
<pre>
The offset in seconds if the event type is `PROGRESS`.
</pre>

<code>.google.protobuf.Duration offset = 4;</code>
java-video-stitcher/proto-google-cloud-video-stitcher-v1/src/main/java/com/google/cloud/video/stitcher/v1/Event.java