Machine Action Question, closing window

[ZachRose 0]

I have a plugin that adds two machine actions for a specific machine in Cura. I've been able to figure out most things from existing models/trial and error but I've gotten stumped by one issue.

Within the action window, the user can click a button to do some http requests with a networked printer. What I would like to happen is the user clicks a button, a confirmation dialog appears, and then if the user clicks "Yes", then the confirmation dialog AND the machine action window will close. Closing the confirmation dialog is simple, I just call .close(), but this doesn't work for the MachineAction. I get this error: 

TypeError: Property 'close' of object NautilusUpdate_QMLTYPE_401(0x600007652470) is not a function

What can I call to close the window?

[ahoeben 1,968]

Try "completed()" instead of ".close()".