code: protected KeyRecord getKeyRecord (int keyCode)
      {
          KeyRecord krec = _keys.get(keyCode);
          if (krec == null) {
              krec = new KeyRecord();
              _keys.put(keyCode, krec);
          }
          return krec;
      }
docs: Returns the key record for the specified key, creating it and inserting it in the key table
  if necessary.