```\\nfunction withdraw(uint256 _share) public {\\n    // Gets the amount of xABR in existence\\n    uint256 totalShares = totalSupply();\\n    // Calculates the amount of ABR the xABR is worth\\n    uint256 what = _share * ABR.balanceOf(address(this)) / totalShares;\\n    _burn(msg.sender, _share);\\n    ABR.transfer(msg.sender, what);\\n}\\n```\\n