pragma solidity ^0.4.24; import "../access/roles/SignerRole.sol"; contract SignerRoleMock is SignerRole { function removeSigner(address account) public { _removeSigner(account); } function onlySignerMock() public view onlySigner { } // Causes a compilation error if super._removeSigner is not internal function _removeSigner(address account) internal { super._removeSigner(account); } }