def METHOD_NAME(self):
    """Updates the family combobox to include a custom font."""
    self.ui.combobox_family.activated.disconnect()
    self.ui.combobox_family.clear()
    l = self.font_list[:]
    if self.family not in l:
        l += [self.family]
    self.ui.combobox_family.insertItems(0, l)
    self.ui.combobox_family.setCurrentIndex(
        self.ui.combobox_family.findText(self.family))
    self.ui.combobox_family.activated.connect(self.apply_family)