pragma solidity ^0.5.0; import "../token/ERC20/IERC20.sol"; import "../crowdsale/validation/WhitelistCrowdsale.sol"; import "../crowdsale/Crowdsale.sol"; contract WhitelistCrowdsaleImpl is Crowdsale, WhitelistCrowdsale { constructor (uint256 _rate, address payable _wallet, IERC20 _token) Crowdsale(_rate, _wallet, _token) public {} }