onRequest method
Called when the request is about to be sent.
Implementation
@override
void onRequest(RequestOptions options, RequestInterceptorHandler handler) {
CommonData.requestingMap[options.hashCode] = CommonData.requestList.length;
DioRequestParser().parser(options).then((RequestModel requestModel) {
CommonData.requestList.add(requestModel);
_updateRequest();
super.onRequest(options, handler);
});
}