isCached static method
isCached returns a boolean indicating whether the given image is cached or not. Returns true if cached, false if not.
Implementation
static bool isCached({required String imageUrl}) {
_checkInit();
final key = _keyFromUrl(imageUrl);
if (_imageKeyBox!.containsKey(key) && _imageBox!.keys.contains(key)) {
return true;
}
return false;
}