WP_REST_Edit_Site_Export_Controller::export(): void|WP_Error

75	public function export() {76		// Generate the export file.77		$filename = wp_generate_block_templates_export_file();78 79		if ( is_wp_error( $filename ) ) {80			$filename->add_data( array( 'status' => 500 ) );81 82			return $filename;83		}84 85		$theme_name = basename( get_stylesheet() );86		header( 'Content-Type: application/zip' );87		header( 'Content-Disposition: attachment; filename=' . $theme_name . '.zip' );88		header( 'Content-Length: ' . filesize( $filename ) );89		flush();90		readfile( $filename );91		unlink( $filename );92		exit;93	}