我的代码看起来有点像:协议(protocol)protocolMyProtocol:class{varfeatureConfigs:[String:Any]?{getset}}基类classMyBaseClass:MyProtocol{varfeatureConfigs:[String:Any]?{get{returnnil}set{self.featureConfigs=newValue}}}子类classMySubclass:MyBaseClass{overridevarfeatureConfigs:[String:Any]?{get{return["feature-specifi