public com.google.protobuf.DurationOrBuilder getIntervalOrBuilder() {
      if (intervalBuilder_ != null) {
        return intervalBuilder_.getMessageOrBuilder();
      } else {
        return interval_ == null ? com.google.protobuf.Duration.getDefaultInstance() : interval_;
      }
    }
<pre>
Create sprites at regular intervals. Valid range is [1 second, 1 hour] and
the default value is `10s`.
</pre>

<code>.google.protobuf.Duration interval = 7;</code>
java-video-live-stream/proto-google-cloud-live-stream-v1/src/main/java/com/google/cloud/video/livestream/v1/SpriteSheet.java