System/Library/PrivateFrameworks/SafariSharedUI.framework

WBSWebExtensionAPIAlarmsObjC.h

NSObject
>
WBSWebExtensionAPIObject

@class WBSWebExtensionAPIEventObjC;

@interface WBSWebExtensionAPIAlarmsObjC : WBSWebExtensionAPIObject {
    WBSWebExtensionAPIEventObjC *_onAlarm;
}

- (void).cxx_destruct;

@end