apply_filters( 'upgrader_pre_download', bool $reply, string $package, WP_Upgrader $upgrader, array $hook_extra )

314		 * @param bool        $reply      Whether to bail without returning the package.315		 *                                Default false.316		 * @param string      $package    The package file name.317		 * @param WP_Upgrader $upgrader   The WP_Upgrader instance.318		 * @param array       $hook_extra Extra arguments passed to hooked filters.319		 */320		$reply = apply_filters( 'upgrader_pre_download', false, $package, $this, $hook_extra );321		if ( false !== $reply ) {322			return $reply;323		}324 325		if ( ! preg_match( '!^(http|https|ftp)://!i', $package ) && file_exists( $package ) ) { // Local file or remote?326			return $package; // Must be a local file.