code: func (v *Image) SetFromResource(resourcePath string) {
  	cstr := C.CString(resourcePath)
  	defer C.free(unsafe.Pointer(cstr))
  	C.gtk_image_set_from_resource(v.native(), (*C.gchar)(cstr))
  }
docs: // SetFromResource() is a wrapper around gtk_image_set_from_resource().