WP_REST_Font_Families_Controller::create_item( WP_REST_Request $request ): WP_REST_Response|WP_Error

173	public function create_item( $request ) {174		$settings = $request->get_param( 'font_family_settings' );175 176		// Check that the font family slug is unique.177		$query = new WP_Query(178			array(179				'post_type'              => $this->post_type,180				'posts_per_page'         => 1,181				'name'                   => $settings['slug'],182				'update_post_meta_cache' => false,183				'update_post_term_cache' => false,184			)185		);186		if ( ! empty( $query->posts ) ) {187			return new WP_Error(188				'rest_duplicate_font_family',189				/* translators: %s: Font family slug. */190				sprintf( __( 'A font family with slug "%s" already exists.' ), $settings['slug'] ),191				array( 'status' => 400 )192			);193		}194 195		return parent::create_item( $request );196	}