# json轉模型
+ (instancetype)yy_modelWithJSON:(id)json;
# 模型轉字符串
- (NSString *)yy_modelToJSONString
# 字典轉模型
+ (instancetype)yy_modelWithDictionary:(NSDictionary *)dictionary ;
# 聲明數組、字典或者集合裏的元素類型時要重寫
+ (nullable NSDictionary<NSString *, id> *)modelContainerPropertyGenericClass;
# 字典裏的key值與模型的屬性值不壹致要重復
+ (nullable NSDictionary<NSString *, id> *)modelCustomPropertyMapper;