dcard_lab_ios_11_11.swift

struct PayloadTransform: TransformType {
    typealias Object = [DCNotificationPayloadKey: Any] 
    typealias JSON = [String: Any]
	
	func transformFromJSON(_ value: Any?) -> [DCNotificationPayloadKey: Any]? { 
        guard let value = value as? [String: Any] else { 
            return [:] 
	}
		
	var result = [AppNotificationPayloadKey: Any]()
        for (key, value) in value { 
            if let payloadKey = DCNotificationPayloadKey(rawValue: key) { 
                result[payloadKey] = value 
            } 
        } 
        return result
    }
	
	func transformToJSON(_ value: [DCNotificationPayloadKey: Any]?) -> [String: Any]? {
        ...
    }
}