openzeppelin-contracts/contracts/mocks/proxy/ClashingImplementation.sol

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev Implementation contract with an admin() function made to clash with
 * @dev TransparentUpgradeableProxy's to test correct functioning of the
 * @dev Transparent Proxy feature.
 */
contract ClashingImplementation {
    function admin() external pure returns (address) {
        return 0x0000000000000000000000000000000011111142;
    }

    function delegatedFunction() external pure returns (bool) {
        return true;
    }
}