interface ICoreRef {
    // ----------- Events -----------

    event CoreUpdate(address indexed _core);

    // ----------- Governor only state changing api -----------

    function setCore(address core) external;

    function pause() external;

    function unpause() external;

    // ----------- Getters -----------

    function core() external view returns (ICore);

    function fei() external view returns (IFei);

    function tribe() external view returns (IERC20_5);

    function feiBalance() external view returns (uint256);

    function tribeBalance() external view returns (uint256);
}
/// @title CoreRef interface
/// @author Fei Protocol
function setCore(address core) external;
// ----------- Governor only state changing api -----------