This class doesn't have any public properties.  Everything is accessed via a get/set or value specific method. The properties are declared public so that they can be serialized with the object.

The property names are prefixed with the '_' and are preceded by the this note in the code:
```
	/**
	 * private region class properties - note that they are marked as public so this object can
	 * be serialized, not to provide access. Consider yourself warned!
	 *
	 * @access private
	 *
	 * @since 3.8.14
	 *
	 */
```