public V compute(K key, BiFunction<? super K, ? super V, ? extends V> remappingFunction) {
        return map().compute(key, remappingFunction);
    }
Calls compute on underlying map, useful when cache is meant to behave as a pull-thru.
@param key tke key
@param remappingFunction the function called if key does not associate to a value
@return the value associated to the key
standalone-metastore/metastore-common/src/main/java/org/apache/hadoop/hive/metastore/properties/SoftCache.java