docs: def verify_is_not_instance(self, obj, cls, msg=""):
          """
          Soft assert for whether the is not an instance of cls
  
          :params obj: the object instance
          :params cls: the class to compare against
          :params msg: (Optional) msg explaining the difference
          """
          try:
              self.assert_is_not_instance(obj, cls, msg)
          except AssertionError, e:
              if msg:
                  m = "%s:\n%s" % (msg, str(e))
              else:
                  m = str(e)
              self.verification_erorrs.append(m)