// SPDX-License-Identifier: MIT pragma solidity ^0.8.15; library OwnableStorage { struct Layout { address owner; } bytes32 internal constant STORAGE_SLOT = keccak256("openzeppelin.contracts.storage.Ownable"); function layout() internal pure returns (Layout storage l) { bytes32 slot = STORAGE_SLOT; assembly { l.slot := slot } } function setOwner(Layout storage l, address owner) internal { l.owner = owner; } }