I can't set my own tag

[zzh1026]

In the 2.0.1 version, lines 71 and 72 have the following code:
Response response = chain.proceed(request); List segmentList = ((Request)request.tag()).url().encodedPathSegments();
I took my url from the tag, but I set the url myself, So a ClassCastException occurs when used,I need to set up my own tag to cancel the request at any time through this tag