It’s an extension function that can be called on a StringBuilder object, and which returns nothing. ...

# getting-started

[dalexander]

It’s an extension function that can be called on a StringBuilder object, and which returns nothing. So if you have some val sb: StringBuilder = ... you could call sb.configure().

[hho]

-> Unit does return a string?

[dalexander]

Oops, I misread that as -> String edited my response