public com.google.cloud.videointelligence.v1.NormalizedVertex.Builder addVerticesBuilder() {
      return getVerticesFieldBuilder()
          .addBuilder(com.google.cloud.videointelligence.v1.NormalizedVertex.getDefaultInstance());
    }
<pre>
Normalized vertices of the bounding polygon.
</pre>

<code>repeated .google.cloud.videointelligence.v1.NormalizedVertex vertices = 1;</code>
java-video-intelligence/proto-google-cloud-video-intelligence-v1/src/main/java/com/google/cloud/videointelligence/v1/NormalizedBoundingPoly.java