public static NavigatorState Of(
BuildContext context,
bool rootNavigator = false,
bool nullOk = false
)
{
var navigator = rootNavigator
? context.RootAncestorStateOfType <NavigatorState>()
: context.AncestorStateOfType <NavigatorState>();
if (!nullOk && navigator == null)
{
throw new Exception(
"Navigator operation requested with a context that does not include a Navigator.\n" +
"The context used to push or pop routes from the Navigator must be that of a " +
"widget that is a descendant of a Navigator widget."
);
}
return(navigator);
}