abstract protected CacheCollector::resolveCacheMiss($key)
Resolves a cache miss.
When an offset is not found in the object, this is treated as a cache miss. This method allows classes using this implementation to look up the actual value and allow it to be cached.
string $key: The offset that was requested.
mixed The value of the offset, or NULL if no value was found.
abstract protected function resolveCacheMiss($key);
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