code: def wait_for_binary_interface(self, **kwargs):
          
          if self.cluster.version() >= '1.2':
              self.watch_log_for("Starting listening for CQL clients", **kwargs)
  
          binary_itf = self.network_interfaces['binary']
          if not common.check_socket_listening(binary_itf, timeout=30):
              warnings.warn("Binary interface %s:%s is not listening after 30 seconds, node may have failed to start."
                            % (binary_itf[0], binary_itf[1]))
docs: Waits for the Binary CQL interface to be listening.  If > 1.2 will check
          log for 'Starting listening for CQL clients' before checking for the
          interface to be listening.
  
          Emits a warning if not listening after 30 seconds.