forceCache property
When true, the image is downloaded once and stored persistently in
IndexedDB (web) or the app documents directory (Android/iOS/desktop)
via TImageStorage.
This provides more stable long-term storage than the OS HTTP cache or
flutter_cache_manager, which can be evicted at any time by the browser
or OS. Subsequent loads skip the network entirely and read from the
local store.
When false (the default) the existing CachedNetworkImage behaviour
is used unchanged.
Implementation
final bool forceCache;