disabling fallback font retrievals whilst offline

[Kevin Chadwick]

Hi,

I have set all of my TextStyles fontFamilyFallback to null.

Even so. I still get "A fallback font was registered but we cannot retrieve the
typeface for it"

I even get this message for the splash screen that only loads an image. Perhaps
the semantics?

Would including the roboto font as an asset avoid these network calls and is
that currently the only way to achieve a quiet app?



p.s. You should not need internet access to unpkg.com (canvaskit.js) in order to
load your app during development for web?

I thought it was devtools still blocking, but that has been fixed.
https://github.com/flutter/devtools/issues/2420