library Address {
    /**
     * Returns true if `account` is a contract.
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies in extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        // solhint-disable-next-line no-inline-assembly
        assembly { size := extcodesize(account) }
        return size > 0;
    }

    /**
     * Converts an `address` into `address payable`. Note that this is
     * simply a type cast: the actual underlying value is not changed.
     */
    function toPayable(address account) internal pure returns (address payable) {
        return address(uint160(account));
    }
}
/**
 * Collection of functions related to the address type
 */
function toPayable(address account) internal pure returns (address payable) {
        return address(uint160(account));
    }
/**
 * Converts an `address` into `address payable`. Note that this is
 * simply a type cast: the actual underlying value is not changed.
 */