pragma solidity ^0.5.0; import "../token/ERC20/ERC20.sol"; import "../crowdsale/validation/PausableCrowdsale.sol"; contract PausableCrowdsaleImpl is PausableCrowdsale { constructor (uint256 _rate, address payable _wallet, ERC20 _token) public { Crowdsale.initialize(_rate, _wallet, _token); PausableCrowdsale.initialize(msg.sender); } }