private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.video.stitcher.v1.FetchOptions,
            com.google.cloud.video.stitcher.v1.FetchOptions.Builder,
            com.google.cloud.video.stitcher.v1.FetchOptionsOrBuilder>
        getSourceFetchOptionsFieldBuilder() {
      if (sourceFetchOptionsBuilder_ == null) {
        sourceFetchOptionsBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.video.stitcher.v1.FetchOptions,
                com.google.cloud.video.stitcher.v1.FetchOptions.Builder,
                com.google.cloud.video.stitcher.v1.FetchOptionsOrBuilder>(
                getSourceFetchOptions(), getParentForChildren(), isClean());
        sourceFetchOptions_ = null;
      }
      return sourceFetchOptionsBuilder_;
    }
<pre>
Options for fetching source manifests and segments.
</pre>

<code>.google.cloud.video.stitcher.v1.FetchOptions source_fetch_options = 16;</code>
java-video-stitcher/proto-google-cloud-video-stitcher-v1/src/main/java/com/google/cloud/video/stitcher/v1/LiveConfig.java