Breake/enable inheritance using powershell

Hello,

I try to modify inheritance from powershell.

This is what i try to use:

$listname = "elso"
$list = $spweb.lists[$listname]
$list.Breakroleinheritance($true)

So i have a list (elso) created but when i run this code the inheritance is not broken. I can still see the stop parent inheritance button.

What is missing?

Will the .breakeroleinheritance($false) enable it again?

I Hate Mondays