docs: private EJSWrapperCommon remove(Object key)
      {
          EJSWrapperCommon removed = ivWrappers.remove(key);
  
          // Indicate that the element (EJSWrapperCommon) is no longer in the
          // cache by setting the pin count to a negative... note that the
          // bucket reference must not be reset to null in order to allow
          // the element to synchronize on the bucket to determine if it
          // is in the cache or not.
          removed.pinned = -1; // negative is no longer in cache.
  
          return removed;
      }