Type:
Class
This DeprecatedConstantProxy transforms constant to deprecated constant.
OLD_CONST = ActiveSupport::Deprecation::DeprecatedConstantProxy.new('OLD_CONST', 'NEW_CONST')
OLD_CONST = ActiveSupport::Deprecation::DeprecatedConstantProxy.new('OLD_CONST', 'NEW_CONST', deprecator_instance)
When someone use old constant this will trigger warn method on
deprecator_instance.
Default deprecator is
ActiveSupport::Deprecation.