public Builder mergeEndTimeOffset(com.google.protobuf.Duration value) {
        if (endTimeOffsetBuilder_ == null) {
          if (((bitField0_ & 0x00000008) != 0)
              && endTimeOffset_ != null
              && endTimeOffset_ != com.google.protobuf.Duration.getDefaultInstance()) {
            getEndTimeOffsetBuilder().mergeFrom(value);
          } else {
            endTimeOffset_ = value;
          }
        } else {
          endTimeOffsetBuilder_.mergeFrom(value);
        }
        if (endTimeOffset_ != null) {
          bitField0_ |= 0x00000008;
          onChanged();
        }
        return this;
      }
<pre>
The time to end the fade animation, in seconds. Default:
`start_time_offset` + 1s
</pre>

<code>.google.protobuf.Duration end_time_offset = 4;</code>
java-video-transcoder/proto-google-cloud-video-transcoder-v1/src/main/java/com/google/cloud/video/transcoder/v1/Overlay.java