code: func (v *StatusIcon) SetFromFile(filename string) {
  	cstr := C.CString(filename)
  	defer C.free(unsafe.Pointer(cstr))
  	C.gtk_status_icon_set_from_file(v.native(), (*C.gchar)(cstr))
  }
docs: // SetFromFile is a wrapper around gtk_status_icon_set_from_file()