public Builder addNormalizedVertices(
        int index, com.google.cloud.vision.v1.NormalizedVertex.Builder builderForValue) {
      if (normalizedVerticesBuilder_ == null) {
        ensureNormalizedVerticesIsMutable();
        normalizedVertices_.add(index, builderForValue.build());
        onChanged();
      } else {
        normalizedVerticesBuilder_.addMessage(index, builderForValue.build());
      }
      return this;
    }
<pre>
The bounding polygon normalized vertices.
</pre>

<code>repeated .google.cloud.vision.v1.NormalizedVertex normalized_vertices = 2;</code>
java-vision/proto-google-cloud-vision-v1/src/main/java/com/google/cloud/vision/v1/BoundingPoly.java