<itemvalue="The `transitionDuration` argument is used to determine how long it takes for the route to arrive on or leave off the screen. This argument defaults to 200 milliseconds. The `transitionBuilder` argument is used to define how the route arrives on and leaves off the screen. By default, the transition is a linear fade of the page's contents. The `routeSettings` will be used in the construction of the dialog's route. See [RouteSettings] for more details. {@macro flutter.widgets.RawDialogRoute} Returns a [Future] that resolves to the value (if any) that was passed to [Navigator.pop] when the dialog was closed. State Restoration in Dialogs Using this method will not enable state restoration for the dialog. In order to enable state restoration for a dialog, use [Navigator.restorablePush] or [Navigator.restorablePushNamed] with [RawDialogRoute]. For more information about state restoration, see [RestorationManager]. {@tool sample} This sample demonstrates how to create a restorable dialog. This is accomplished by enabling state restoration by specifying [WidgetsApp.restorationScopeId] and using [Navigator.restorablePush] to push [RawDialogRoute] when the button is tapped. {@macro flutter.widgets.RestorationManager} See code in examplesapilibwidgetsroutesshow_general_dialog.0.dart {@end-tool}"/>
<itemvalue="Displays a dialog above the current contents of the app. This function allows for customization of aspects of the dialog popup. This function takes a `pageBuilder` which is used to build the primary content of the route (typically a dialog widget). Content below the dialog is dimmed with a [ModalBarrier]. The widget returned by the `pageBuilder` does not share a context with the location that `showGeneralDialog` is originally called from. Use a [StatefulBuilder] or a custom [StatefulWidget] if the dialog needs to update dynamically. The `pageBuilder` argument can not be null. The `context` argument is used to look up the [Navigator] for the dialog. It is only used when the method is called. Its corresponding widget can be safely removed from the tree before the dialog is closed. The `useRootNavigator` argument is used to determine whether to push the dialog to the [Navigator] furthest from or nearest to the given `context`. By default, `useRootNavigator` is `true` and the dialog route created by this method is pushed to the root navigator. If the application has multiple [Navigator] objects, it may be necessary to call `Navigator.of(context, rootNavigator: true).pop(result)` to close the dialog rather than just `Navigator.pop(context, result)`. The `barrierDismissible` argument is used to determine whether this route can be dismissed by tapping the modal barrier. This argument defaults to false. If `barrierDismissible` is true, a non-null `barrierLabel` must be provided. The `barrierLabel` argument is the semantic label used for a dismissible barrier. This argument defaults to `null`. The `barrierColor` argument is the color used for the modal barrier. This argument defaults to `Color(0x80000000)`."/>
