docs: private int getHashForKey(long key)
  	{
  		if (tc.isEntryEnabled()) Tr.entry(tc, "getHashForKey", new Object[]{new Long(key), this});
  		
  		int hash = (int) (key % _mapSize);
  		if (hash < 0) hash = -hash;
  	
  		if (tc.isEntryEnabled()) Tr.exit(tc, "getHashForKey", new Integer(hash));
  		return hash;
  	}