function _timelockMint(address account, uint256 amount, uint256 timelockLength) internal virtual {
  uint256 timelockFinish = block.timestamp + timelockLength;
  timelock[account] = timelockFinish;
  emit Timelocked(account, timelockFinish);
  _mint(account, amount);
}
function _timelockMint(address account, uint256 amount, uint256 timelockLength) internal virtual {
  uint256 timelockFinish = block.timestamp + timelockLength;
  if(timelockFinish > timelock[account]){
    timelock[account] = timelockFinish;
    emit Timelocked(account, timelockFinish);
  }
  _mint(account, amount);
}
