Vm private constant vm = Vm(address(uint160(uint256(keccak256("hevm cheat code")))));
function sigs(string memory sigStr) internal pure returns (bytes4);
function find(StdStorage storage self) internal returns (uint256);
function find(StdStorage storage self, bool _clear) internal returns (uint256);
function target(StdStorage storage self, address _target) internal returns (StdStorage storage);
function sig(StdStorage storage self, bytes4 _sig) internal returns (StdStorage storage);
function sig(StdStorage storage self, string memory _sig) internal returns (StdStorage storage);
function with_key(StdStorage storage self, address who) internal returns (StdStorage storage);
function with_key(StdStorage storage self, uint256 amt) internal returns (StdStorage storage);
function with_key(StdStorage storage self, bytes32 key) internal returns (StdStorage storage);
function with_calldata(StdStorage storage self, bytes memory _calldata) internal returns (StdStorage storage);
function enable_packed_slots(StdStorage storage self) internal returns (StdStorage storage);
function depth(StdStorage storage self, uint256 _depth) internal returns (StdStorage storage);
function clear(StdStorage storage self) internal;
function checked_write(StdStorage storage self, address who) internal;
function checked_write(StdStorage storage self, uint256 amt) internal;
function checked_write_int(StdStorage storage self, int256 val) internal;
function checked_write(StdStorage storage self, bool write) internal;
function checked_write(StdStorage storage self, bytes32 set) internal;
function read_bytes32(StdStorage storage self) internal returns (bytes32);
function read_bool(StdStorage storage self) internal returns (bool);
function read_address(StdStorage storage self) internal returns (address);
function read_uint(StdStorage storage self) internal returns (uint256);
function read_int(StdStorage storage self) internal returns (int256);
function parent(StdStorage storage self) internal returns (uint256, bytes32);
function root(StdStorage storage self) internal returns (uint256);