private com.google.protobuf.SingleFieldBuilderV3<
            com.google.protobuf.Duration,
            com.google.protobuf.Duration.Builder,
            com.google.protobuf.DurationOrBuilder>
        getIntervalFieldBuilder() {
      if (intervalBuilder_ == null) {
        if (!(extractionStrategyCase_ == 10)) {
          extractionStrategy_ = com.google.protobuf.Duration.getDefaultInstance();
        }
        intervalBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.protobuf.Duration,
                com.google.protobuf.Duration.Builder,
                com.google.protobuf.DurationOrBuilder>(
                (com.google.protobuf.Duration) extractionStrategy_,
                getParentForChildren(),
                isClean());
        extractionStrategy_ = null;
      }
      extractionStrategyCase_ = 10;
      onChanged();
      return intervalBuilder_;
    }
<pre>
Starting from `0s`, create sprites at regular intervals. Specify the
interval value in seconds.
</pre>

<code>.google.protobuf.Duration interval = 10;</code>
java-video-transcoder/proto-google-cloud-video-transcoder-v1/src/main/java/com/google/cloud/video/transcoder/v1/SpriteSheet.java