How to connect to Qt.inputMethod.visibleChanged in qml

[mira]

Hi,
I am trying to perfrom some action when the virtual keyboard appears or hides on android. For this I am trying to connect to the visibleChanged signal like this:

Qt.inputMethod.onVisibleChanged: {
       ...
    }

but i'm getting an error:

Non-existent attached object

How do I do this properly?

Thanks!

Mira