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 contract Utils    - function Utils()    - function safeAdd(uint256 _x, uint256 ...    - function safeSub(uint256 _x, uint256 ...    - function safeMul(uint256 _x, uint256 ...  contract IOwned    - function owner()    - function transferOwnership(address _n ...    - function acceptOwnership()  contract Owned is IOwned    - function Owned()    - function transferOwnership(address _n ...    - function acceptOwnership()  contract ITokenHolder is IOwned    - function withdrawTokens(IERC20Token _ ...  contract TokenHolder is ITokenHold ...    - function TokenHolder()    - function withdrawTokens(IERC20Token _ ...  contract IERC20Token    - function name()    - function symbol()    - function decimals()    - function totalSupply()    - function balanceOf(address _owner)    - function allowance(address _owner, ad ...    - function transfer(address _to, uint25 ...    - function transferFrom(address _from, ...    - function approve(address _spender, ui ...  contract ERC20Token is IERC20Token ...    - function ERC20Token(string _name, str ...    - function transfer(address _to, uint25 ...    - function transferFrom(address _from, ...    - function approve(address _spender, ui ...  contract IEtherToken is ITokenHold ...    - function deposit()    - function withdraw(uint256 _amount)    - function withdrawTo(address _to, uint ...  contract EtherToken is IEtherToken ... *    - function EtherToken()    - function deposit()    - function withdraw(uint256 _amount)    - function withdrawTo(address _to, uint ...    - function transfer(address _to, uint25 ...    - function transferFrom(address _from, ...    - function()

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/**
 *Submitted for verification at Etherscan.io on 2017-09-10
*/
pragma solidity ^0.4.11;
/*
    Utilities & Common Modifiers
*/
contract Utils {
    /**
        constructor
    */
    function Utils() {
    }
    // verifies that an amount is greater than zero
    modifier greaterThanZero(uint256 _amount) {
        require(_amount > 0);
        _;
    }
    // validates an address - currently only checks that it isn't null
    modifier validAddress(address _address) {
        require(_address != 0x0);
        _;
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