pragma solidity ^0.4.24; import "../access/Roles.sol"; contract RolesMock { using Roles for Roles.Role; Roles.Role private dummyRole; function add(address account) public { dummyRole.add(account); } function remove(address account) public { dummyRole.remove(account); } function has(address account) public view returns (bool) { return dummyRole.has(account); } }