// to follow what a test is doing since the Sip operations are not
// buried as parameters in assert statements:
b.sendIncomingCallResponse(Response.OK, "Answer - Hello world", 0);
assertLastOperationSuccess("Sending answer response failed - "
+ b.format(), b);
// note with the single step method, you cannot include operation
// error details for when the test fails: ' + a.format()' wouldn't
// work in the first parameter here: