     # [wasm_bindgen (catch , method , structural , js_class = "CustomElementRegistry" , js_name = define)]     #[doc = "The `define()` method."]     #[doc = ""]     #[doc = "[MDN Documentation](https://developer.mozilla.org/en-US/docs/Web/API/CustomElementRegistry/define)"]     #[doc = ""]     #[doc = "*This API requires the following crate features to be activated: `CustomElementRegistry`, `