How to set raiseErrors to true

[nethriis]

I want to use

await response.download('image.png')

But to make this the help popup says :

If raiseErrors=false, then this method will self handle all the exceptions by writing a generic HTTP response. To have more control over the error, it is recommended to set raiseErrors=true and wrap this function inside a try/catch statement.

How can I set raiseErrors to true ?