*/
	public function update_item( $request ) {

		$prepared = $this->prepare_item_for_database( $request );
		// Exclude additional fields registered via `register_rest_field()`.
		$prepared = array_diff_key( $prepared, $this->get_additional_fields() );
		$webhook  = LLMS_REST_API()->webhooks()->update( $prepared );
		if ( is_wp_error( $request ) ) {
			$request->add_data( array( 'status' => 400 ) );
			return $request;
		}

		// Fields registered via `register_rest_field()`.
		$fields_update = $this->update_additional_fields_for_object( $webhook, $request );