pragma solidity ^0.5.0; import "../utils/EnumerableSet.sol"; contract EnumerableSetMock{ using EnumerableSet for EnumerableSet.AddressSet; event TransactionResult(bool result); EnumerableSet.AddressSet private set; constructor() public { set = EnumerableSet.newAddressSet(); } function contains(address value) public view returns (bool) { return set.contains(value); } function add(address value) public { bool result = set.add(value); emit TransactionResult(result); } function remove(address value) public { bool result = set.remove(value); emit TransactionResult(result); } function enumerate() public view returns (address[] memory) { return set.enumerate(); } }