merge method
Implementation
PageRouteOptions merge([PageRouteOptions? options]) => copyWith(
maintainState: options?.maintainState,
fullscreenDialog: options?.fullscreenDialog,
title: options?.title,
settings: options?.settings,
allowSnapshotting: options?.allowSnapshotting,
barrierDismissible: options?.barrierDismissible,
builder: options?.builder,
style: options?.style,
);