code: def client_sends_binary(self, message, name=None, label=None):
          
          client, name = self._clients.get_with_name(name)
          client.send(message)
          self._register_send(client, label, name)
docs: Send raw binary `message`.
  
          If client `name` is not given, uses the latest client. Optional message
          `label` is shown on logs.
  
          Examples:
          | Client sends binary | Hello! |
          | Client sends binary | ${some binary} | Client1 | label=DebugMessage |