```\n/// @notice Initializes Keep Vendor contract implementation.\n/// @param registryAddress Keep registry contract linked to this contract.\nfunction initialize(\n    address registryAddress\n)\n    public\n{\n    require(!initialized(), "Contract is already initialized.");\n    \_initialized["BondedECDSAKeepVendorImplV1"] = true;\n    registry = Registry(registryAddress);\n}\n```\n