has method

bool has(
  1. String key
)

Check if key exists and is not expired

Implementation

bool has(String key) {
  final cached = _cache[key];
  if (cached == null) return false;
  if (cached.isExpired) {
    _cache.remove(key);
    _accessFrequency.remove(key);
    return false;
  }
  return true;
}