Request for clarification on QueuedInterceptor example

[vasilich6107]

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Issue Info

Hi. You have this example for queued interceptor.

https://github.com/flutterchina/dio/blob/a4392ff8412bfe1e3e86ae45f81fe1fc117bc56e/example/lib/queued_interceptor_crsftoken.dart

Issue Description and Steps

onError you are requesting new token with different Dio client called tokenDio https://github.com/flutterchina/dio/blob/a4392ff8412bfe1e3e86ae45f81fe1fc117bc56e/example/lib/queued_interceptor_crsftoken.dart#L48

Does this mean that dio client is paused?

If the main dio client is paused why do you retry the failed request with dio client https://github.com/flutterchina/dio/blob/a4392ff8412bfe1e3e86ae45f81fe1fc117bc56e/example/lib/queued_interceptor_crsftoken.dart#L53

Looks a little bit confusing.

Could you clarify why it works? Why we can do retry with the same client but have to request token with different one?