Get widget variable name from event?

Hi,

is it possible to retrieve the name of an element that triggers an event?
For example, if I have a FocusPanel which triggers a MouseOverEvent, can I get the variable name of that panel somehow from the event?


@UiField
FocusPanel panel;

@UiHandler("panel")
void mouseOver(MouseOverEvent ev) {
    Window.alert("you clicked the element named 'panel'"); //how could I use the 'ev' to get the name 'panel'?
}

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