```\nimport {IRioLRTOperatorRegistry} from 'contracts/interfaces/IRioLRTOperatorRegistry.sol';\nimport {RioLRTOperatorDelegator} from 'contracts/restaking/RioLRTOperatorDelegator.sol';\nimport {CredentialsProofs, BeaconWithdrawal} from 'test/utils/beacon-chain/MockBeaconChain.sol';\n```\n