private com.google.protobuf.SingleFieldBuilderV3<
              com.google.cloud.video.livestream.v1.TimeInterval,
              com.google.cloud.video.livestream.v1.TimeInterval.Builder,
              com.google.cloud.video.livestream.v1.TimeIntervalOrBuilder>
          getTimeIntervalFieldBuilder() {
        if (timeIntervalBuilder_ == null) {
          if (!(kindCase_ == 1)) {
            kind_ = com.google.cloud.video.livestream.v1.TimeInterval.getDefaultInstance();
          }
          timeIntervalBuilder_ =
              new com.google.protobuf.SingleFieldBuilderV3<
                  com.google.cloud.video.livestream.v1.TimeInterval,
                  com.google.cloud.video.livestream.v1.TimeInterval.Builder,
                  com.google.cloud.video.livestream.v1.TimeIntervalOrBuilder>(
                  (com.google.cloud.video.livestream.v1.TimeInterval) kind_,
                  getParentForChildren(),
                  isClean());
          kind_ = null;
        }
        kindCase_ = 1;
        onChanged();
        return timeIntervalBuilder_;
      }
<pre>
A time interval in the form of a tuple of Unix epoch time.
</pre>

<code>.google.cloud.video.livestream.v1.TimeInterval time_interval = 1;</code>
java-video-live-stream/proto-google-cloud-live-stream-v1/src/main/java/com/google/cloud/video/livestream/v1/DvrSession.java