contract BalancingToken is ERC20 {
    mapping (address => uint256) public balances;      //!< array of all balances

    function balanceOf(address _owner) public constant returns (uint256 balance) {
        return balances[_owner];
    }
}
function balanceOf(address _owner) public constant returns (uint256 balance) {
    return balances[_owner];
}

//!< array of all balances