public Builder clearOffset() {
      bitField0_ = (bitField0_ & ~0x00000008);
      offset_ = null;
      if (offsetBuilder_ != null) {
        offsetBuilder_.dispose();
        offsetBuilder_ = null;
      }
      onChanged();
      return this;
    }
<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