private com.google.protobuf.RepeatedFieldBuilderV3<
            com.google.cloud.vision.v1p4beta1.Property,
            com.google.cloud.vision.v1p4beta1.Property.Builder,
            com.google.cloud.vision.v1p4beta1.PropertyOrBuilder>
        getPropertiesFieldBuilder() {
      if (propertiesBuilder_ == null) {
        propertiesBuilder_ =
            new com.google.protobuf.RepeatedFieldBuilderV3<
                com.google.cloud.vision.v1p4beta1.Property,
                com.google.cloud.vision.v1p4beta1.Property.Builder,
                com.google.cloud.vision.v1p4beta1.PropertyOrBuilder>(
                properties_, ((bitField0_ & 0x00000100) != 0), getParentForChildren(), isClean());
        properties_ = null;
      }
      return propertiesBuilder_;
    }
<pre>
Some entities may have optional user-supplied `Property` (name/value)
fields, such a score or string that qualifies the entity.
</pre>

<code>repeated .google.cloud.vision.v1p4beta1.Property properties = 9;</code>
java-vision/proto-google-cloud-vision-v1p4beta1/src/main/java/com/google/cloud/vision/v1p4beta1/EntityAnnotation.java