[Spinbox] change font from value (Controls 2.0)

[freaksdd]

Hi,
i created a Spinbox with QtQuick.Controls 2.0 an I want to change the font from the value.
in the API there stand "font: ", but in anyway i could not change any thing like Bold letters.
have anybody an idea?
Thanks

Update:
I solved it alone:

property font my_font: Qt.font({
bold: true
})

....thats all

[jpnurmi]

SpinBox {
    font.bold: true
}