Hey Guys, We've been using proto_helpers.StringTransport for awhile in testing and recently added TLS support we wanted to test as well. Has anyone subclassed StringTransport to add startTLS support? We added the _TLSConnectionMixin, _TLSClientMixin mixins to a new StringTransportTLS subclass, but its throwing some basic errors we're crunching through: 'StringTransportTLS' object has no attribute 'protocol' So I thought I'd see if anyone had any pointers on doing this better. Thank you in advance. -J