pragma solidity ^0.5.0; import "../payment/PullPayment.sol"; // mock class using PullPayment contract PullPaymentMock is PullPayment { constructor () public payable { // solhint-disable-previous-line no-empty-blocks } // test helper function to call asyncTransfer function callTransfer(address dest, uint256 amount) public { _asyncTransfer(dest, amount); } }