canOpenURL(url: string): Promise<boolean> {
    Linking._validateURL(url);
    return LinkingManager.canOpenURL(url);
  }
Determine whether or not an installed app can handle a given URL.

NOTE: For web URLs, the protocol ("http://", "https://") must be set accordingly!

NOTE: As of iOS 9, your app needs to provide the `LSApplicationQueriesSchemes` key
inside `Info.plist` or canOpenURL will always return false.

@param URL the URL to open