private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.video.stitcher.v1.VodSession.GamSettings,
            com.google.cloud.video.stitcher.v1.VodSession.GamSettings.Builder,
            com.google.cloud.video.stitcher.v1.VodSession.GamSettingsOrBuilder>
        getGamSettingsFieldBuilder() {
      if (gamSettingsBuilder_ == null) {
        gamSettingsBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.video.stitcher.v1.VodSession.GamSettings,
                com.google.cloud.video.stitcher.v1.VodSession.GamSettings.Builder,
                com.google.cloud.video.stitcher.v1.VodSession.GamSettingsOrBuilder>(
                getGamSettings(), getParentForChildren(), isClean());
        gamSettings_ = null;
      }
      return gamSettingsBuilder_;
    }
<pre>
This field should be set with appropriate values if GAM is being used for
ads.
</pre>

<code>.google.cloud.video.stitcher.v1.VodSession.GamSettings gam_settings = 13;</code>
java-video-stitcher/proto-google-cloud-video-stitcher-v1/src/main/java/com/google/cloud/video/stitcher/v1/VodSession.java