Invoke play-mode-save for a class. This class's fields will be scanned upon exiting play mode, and its property values will be applied to the scene object. This is a stopgap measure that will become obsolete once Unity implements play-mode-save in a more general way.

public sealed class SaveDuringPlayAttribute : Attribute

Cinemachine.SaveDuringPlayAttribute = function();

Type.createClass(
	'Cinemachine.SaveDuringPlayAttribute',
	Attribute);