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package com.mageddo.commons.caching;

import java.util.function.Function;

public interface Cache {

  boolean containsKey(String key);

   T get(String k);

   T get(String k, T def);

  /**
   * This operation must be used with lock in the implemented method.
   */
   T computeIfAbsent(String key, Function mappingFunction);

  void clear();

  boolean isEmpty();
}