checkNotNull(value);
    Timestamped<V> oldValue = cachingHashMap.put(key, new Timestamped<V>(value, ticker));
    if (oldValue == null) {
      return null;
    }
    alertListenerIfPresent(key, oldValue.getValue(), RemovalCause.REPLACED);
    return oldValue.getValue();
  }

  @CanIgnoreReturnValue
  @Override
  public V remove(Object key) {
    Timestamped<V> stamped = cachingHashMap.remove(key);

        protected String getUrl() {
            if (url != null) {
                return url;
            }
            return id;
        }
    }

    /**
     * Statistics data object that stores timestamped events and maintains reference counting.
     * Extends LinkedHashMap to store event names mapped to their timestamps.
     * Includes reference counting for multi-threaded access tracking.
     */

         <match value="0x06092a864886f70d0107FFa0" type="string"
                 mask="0xFFFFFFFFFFFFFFFFFFFF00FF" offset="6"/>
      </match>
    </magic>
  </mime-type>

  <mime-type type="application/timestamped-data">
    <glob pattern="*.tsd"/>
    <magic priority="50">
      <match value="0x3080060B2A864886F7" type="string" offset="0"/>
    </magic>
  </mime-type>

  <mime-type type="application/pkix-cert">