disableFontFallbacks property
final
When true, the font fallback system will be disabled.
We need to disable font fallbacks for some framework tests because
Flutter error messages may contain an arrow symbol which is not
covered by ASCII fonts. This causes us to try to download the
Noto Sans Symbols font, which kicks off a Timer which doesn't
complete before the Widget tree is disposed (this is by design).
Implementation
final bool disableFontFallbacks;