Joris Van Bossche

Hi, I'm using the script that's described here: https://www.w3schools.com/bootstrap/bootstrap_collapse.asp under the chapitre 'accordion'. This idea is what I'm looking for. In this example you see that the first group is already fold out. Is it possible to create the same idea but with all groups fold in by default? If so, what's need modified or added to the script to realise this? Already thanks for who can help me!