code: func (v *FontChooser) SetFont(font string) {
  	cstr := C.CString(font)
  	defer C.free(unsafe.Pointer(cstr))
  	C.gtk_font_chooser_set_font(v.native(), (*C.gchar)(cstr))
  }
docs: // SetFont is a wrapper around gtk_font_chooser_set_font().