What is deferred loading in the specific context of a Flutter web app, and how does it let you meaningfully reduce your app's own initial download size by only actually loading certain specific code when it is genuinely actually needed?

Deferred loading lets you explicitly mark certain specific parts of your app's own overall codebase, such as a genuinely rarely visited settings screen or an admin only specific section, to only actually be downloaded and loaded the very first time a user genuinely actually navigates to that particular specific part of the app, rather than including absolutely everything together within that app's own single initial upfront download, and this can meaningfully reduce your Flutter web app's own initial load time considerably, particularly for a genuinely large app containing many distinct different individual features that any given single particular user might not actually ever even need to use at all.

import 'admin_screen.dart' deferred as admin;

await admin.loadLibrary();
admin.AdminScreen();