  function mintToken(
    bytes32[] calldata proof
  )
    public
    payable
@=> whenNotPaused
    nonReentrant
    onlyWhitelisted(proof, keccak256(abi.encodePacked(msg.sender)))
  {...}

  function _beforeTokenTransfer(
    address from,
    address to,
    uint256 firstTokenId,
    uint256 batchSize
  ) internal virtual override {
	    super._beforeTokenTransfer(from, to, firstTokenId, batchSize);
		...
@=>     require(!paused(), 'ERC721Pausable: token transfer while paused'); // @note: why not use whenNotPaused
  }
