private com.google.protobuf.SingleFieldBuilderV3<
              com.google.cloud.vision.v1p3beta1.Position,
              com.google.cloud.vision.v1p3beta1.Position.Builder,
              com.google.cloud.vision.v1p3beta1.PositionOrBuilder>
          getPositionFieldBuilder() {
        if (positionBuilder_ == null) {
          positionBuilder_ =
              new com.google.protobuf.SingleFieldBuilderV3<
                  com.google.cloud.vision.v1p3beta1.Position,
                  com.google.cloud.vision.v1p3beta1.Position.Builder,
                  com.google.cloud.vision.v1p3beta1.PositionOrBuilder>(
                  getPosition(), getParentForChildren(), isClean());
          position_ = null;
        }
        return positionBuilder_;
      }
<pre>
Face landmark position.
</pre>

<code>.google.cloud.vision.v1p3beta1.Position position = 4;</code>
java-vision/proto-google-cloud-vision-v1p3beta1/src/main/java/com/google/cloud/vision/v1p3beta1/FaceAnnotation.java