<itemvalue="Attempts to authenticate a user using one or more strategies. [type] is a strategy name to try, or a `List` of such. If a strategy returns `null` or `false`, either the next one is tried, or a `401 Not Authenticated` is thrown, if it is the last one. Any other result is considered an authenticated user, and terminates the loop."/>
<itemvalue="Shows a platform alert dialog with custom button titles. You can assign up to 3 buttons in the alert dialog. The method follows the convention on Android. [positiveButtonTitle] is the title of the positive button like for "OK" or "Yes", [negativeButtonTitle] is the title for the negative button like "Cancel" or "No", while [neutralButtonTitle] is for other buttons."/>
<itemvalue="Removes the topmost Flutter instance, presenting what was before it. On Android, removes this activity from the stack and returns to the previous activity. On iOS, calls `popViewControllerAnimated:` if the root view controller is a `UINavigationController`, or `dismissViewControllerAnimated:completion:` if the top view controller is a `FlutterViewController`. The optional `animated` parameter is ignored on all platforms except iOS where it is an argument to the aforementioned methods. This method should be preferred over calling `dart:io`'s [exit] method, as the latter may cause the underlying platform to act as if the application had crashed."/>
<itemvalue="'Focus.of() was called with a context that does not contain a Focus between the given ' 'context and the nearest FocusScope widget.\n' 'No Focus ancestor could be found starting from the context that was passed to ' 'Focus.of() to the point where it found the nearest FocusScope widget. This can happen ' 'because you are using a widget that looks for a Focus ancestor, and do not have a ' 'Focus widget ancestor in the current FocusScope.\n' 'The context used was:\n'"/>