public Builder setPosition(com.google.cloud.vision.v1p4beta1.Position value) {
        if (positionBuilder_ == null) {
          if (value == null) {
            throw new NullPointerException();
          }
          position_ = value;
        } else {
          positionBuilder_.setMessage(value);
        }
        bitField0_ |= 0x00000002;
        onChanged();
        return this;
      }
<pre>
Face landmark position.
</pre>

<code>.google.cloud.vision.v1p4beta1.Position position = 4;</code>
java-vision/proto-google-cloud-vision-v1p4beta1/src/main/java/com/google/cloud/vision/v1p4beta1/FaceAnnotation.java