getCachedNullable method
Implementation
V? getCachedNullable(K key, V? Function() computer, {int? cacheLimit}) {
checkCachedEntry(key);
var cached = this[key];
if (cached != null) return cached;
checkCacheLimit(cacheLimit);
var val = computer();
if (val == null) return val;
this[key] = val;
return val;
}