Pass object + property name into custom editor?

example.qml

//
// In this example, there's a root context property `machine`
// available, which has properties `depthFrom` and `depthTo`,
// which the FloatEditors below are supposed to control.
//
// How would I pass that information (`machine` + the name of
// the property) into each FloatEditor instance?
//
SomeWhereInMyApp {
    
    Text {
        text: "Depth From (m):"
    }
    FloatEditor {
        id: fromDepthEditor
    }
    
    Text {
        text: "Depth To (m):"
    }
    FloatEditor {
        id: toDepthEditor
    }
}