exists = mapper.isKeyStrokeDefined(ke,isAltGr);
exists = KeyMapper.isKeyStrokeDefined(ke,isAltGr);
   private boolean isAvailable(KeyEvent ke) {      boolean exists = true;      if (isLinux) {          exists = mapper.isKeyStrokeDefined(ke,isAltGr);      }      else {         exists = mapper.isKeyStrokeDefined(ke);      }      if (exists) {         Object[] args = {getKeyDescription(ke)};         int result = JOptionPane.showConfirmDialog(this,                     LangTool.messageFormat("messages.mapKeyWarning",args),                     LangTool.getString("key.labelKeyExists"),                     JOptionPane.YES_NO_OPTION,                     JOptionPane.WARNING_MESSAGE);         if (result == JOptionPane.YES_OPTION)            return true;         else            return false;      }      return !exists;   }