Language_Pack_Upgrader::async_upgrade( false|WP_Upgrader $upgrader = false )

49	public static function async_upgrade( $upgrader = false ) {50		// Avoid recursion.51		if ( $upgrader && $upgrader instanceof Language_Pack_Upgrader ) {52			return;53		}54 55		// Nothing to do?56		$language_updates = wp_get_translation_updates();57		if ( ! $language_updates ) {58			return;59		}60 61		/*62		 * Avoid messing with VCS installations, at least for now.63		 * Noted: this is not the ideal way to accomplish this.64		 */65		$check_vcs = new WP_Automatic_Updater();66		if ( $check_vcs->is_vcs_checkout( WP_CONTENT_DIR ) ) {67			return;68		}69 70		foreach ( $language_updates as $key => $language_update ) {71			$update = ! empty( $language_update->autoupdate );72 73			/**74			 * Filters whether to asynchronously update translation for core, a plugin, or a theme.75			 *76			 * @since 4.0.077			 *78			 * @param bool   $update          Whether to update.79			 * @param object $language_update The update offer.80			 */81			$update = apply_filters( 'async_update_translation', $update, $language_update );82 83			if ( ! $update ) {84				unset( $language_updates[ $key ] );85			}86		}87 88		if ( empty( $language_updates ) ) {89			return;90		}91 92		// Re-use the automatic upgrader skin if the parent upgrader is using it.93		if ( $upgrader && $upgrader->skin instanceof Automatic_Upgrader_Skin ) {94			$skin = $upgrader->skin;95		} else {96			$skin = new Language_Pack_Upgrader_Skin(97				array(98					'skip_header_footer' => true,99				)100			);101		}102 103		$lp_upgrader = new Language_Pack_Upgrader( $skin );104		$lp_upgrader->bulk_upgrade( $language_updates );105	}