supportsCloseForLaunchMode function
Returns true if closeInAppWebView is supported for mode
in the current
platform implementation.
If this returns false, closeInAppWebView will not work when launching
URLs with mode
.
Implementation
Future<bool> supportsCloseForLaunchMode(LaunchMode mode) {
return UrlLauncherPlatform.instance.supportsMode(convertLaunchMode(mode));
}