getExpiryForAccess method
Gets the Duration before an accessed CacheEntry is considered expired.
This method is called by a caching implementation after a CacheEntry is
accessed to determine the Duration before an entry expires. If a
Duration.zero is returned a CacheEntry will be considered immediately expired.
Returning null
will result in no change to the previously understood expiry
Duration
Returns the new Duration before an accessed entry expires
Implementation
@override
Duration getExpiryForAccess() {
// Accessing a cache entry resets the duration.
return _expiryDuration;
}