private com.google.protobuf.SingleFieldBuilderV3<
            com.google.protobuf.Duration,
            com.google.protobuf.Duration.Builder,
            com.google.protobuf.DurationOrBuilder>
        getEndTimeOffsetFieldBuilder() {
      if (endTimeOffsetBuilder_ == null) {
        endTimeOffsetBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.protobuf.Duration,
                com.google.protobuf.Duration.Builder,
                com.google.protobuf.DurationOrBuilder>(
                getEndTimeOffset(), getParentForChildren(), isClean());
        endTimeOffset_ = null;
      }
      return endTimeOffsetBuilder_;
    }
<pre>
End time in seconds, relative to the output file timeline. When
`end_time_offset` is not specified, the sprites are generated until the end
of the output file.
</pre>

<code>.google.protobuf.Duration end_time_offset = 8;</code>
java-video-transcoder/proto-google-cloud-video-transcoder-v1/src/main/java/com/google/cloud/video/transcoder/v1/SpriteSheet.java