    /// @inheritdoc IERC721Metadata
    function safeTransferFrom(
        address _from,
        address _to,
        uint256 _tokenId,
        bytes calldata /* _data */
    ) external payable {
        _transfer(_from, _to, _tokenId);
        _onTransferReceived(msg.sender, _from, _to, _tokenId); 
    function _onTransferReceived(
        address _sender,
        address _from,
        address _to,
        uint256 _tokenId,
        bytes calldata data
    ) internal {
    ...

        bytes4 data = IERC721TokenReceiver(_to).onERC721Received(
            _sender,
            _from,
            _tokenId, 
            data
        );
      ...
    }


    /// @inheritdoc IERC721Metadata
    function safeTransferFrom(
        address _from,
        address _to,
        uint256 _tokenId
    ) external payable {
        _transfer(_from, _to, _tokenId);
        _onTransferReceived(msg.sender, _from, _to, _tokenId, "");
    }

    /// @inheritdoc IERC721Metadata
    function safeTransferFrom(
        address _from,
        address _to,
        uint256 _tokenId,
        bytes calldata  _data 
    ) external payable {
        _transfer(_from, _to, _tokenId);
        _onTransferReceived(msg.sender, _from, _to, _tokenId, _data);
    }
