How to call multiple functions in onPressed() in Flutter?

There are one example to do it:

RaisedButton(
               color: Colors.blueAccent, 
               onPressed: () {
               sendData(); //fun1
               signupPage(context); //fun2
               },
               child: 
                Text("Signup"),
             )

This is how I add a SnackBar into my code:

            Padding(
              padding: const EdgeInsets.all(8.0),
              child: Center(
                  child: ElevatedButton(
                      onPressed: () {
                        const postSuccessfullySnackBar = SnackBar(
                          content: Text('Your item posted! 0v0'),
                        );
                        _addNewItemInfoEntry();
                        ScaffoldMessenger.of(context)
                            .showSnackBar(postSuccessfullySnackBar);
                      },
                      child: const Text('Post Item'))),
            )