init static method
Implementation
static void init(BuildContext context,{Size designSize = defaultSize}) {
_instance = ScreenUtil._();
_instance.uiSize = designSize;
_instance.context=context;
}
static void init(BuildContext context,{Size designSize = defaultSize}) {
_instance = ScreenUtil._();
_instance.uiSize = designSize;
_instance.context=context;
}