/usr/include/ola/rdm/ is in libola-dev 0.10.3.nojsmin-2+deb9u1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/ola/rdm/AckTimerResponder.h
/usr/include/ola/rdm/AdvancedDimmerResponder.h
/usr/include/ola/rdm/CommandPrinter.h
/usr/include/ola/rdm/DimmerResponder.h
/usr/include/ola/rdm/DimmerRootDevice.h
/usr/include/ola/rdm/DimmerSubDevice.h
/usr/include/ola/rdm/DiscoveryAgent.h
/usr/include/ola/rdm/DummyResponder.h
/usr/include/ola/rdm/MessageDeserializer.h
/usr/include/ola/rdm/MessageSerializer.h
/usr/include/ola/rdm/MovingLightResponder.h
/usr/include/ola/rdm/NetworkManagerInterface.h
/usr/include/ola/rdm/NetworkResponder.h
/usr/include/ola/rdm/OpenLightingEnums.h
/usr/include/ola/rdm/PidStore.h
/usr/include/ola/rdm/PidStoreHelper.h
/usr/include/ola/rdm/QueueingRDMController.h
/usr/include/ola/rdm/RDMAPI.h
/usr/include/ola/rdm/RDMAPIImplInterface.h
/usr/include/ola/rdm/RDMCommand.h
/usr/include/ola/rdm/RDMCommandSerializer.h
/usr/include/ola/rdm/RDMControllerAdaptor.h
/usr/include/ola/rdm/RDMControllerInterface.h
/usr/include/ola/rdm/RDMEnums.h
/usr/include/ola/rdm/RDMFrame.h
/usr/include/ola/rdm/RDMHelper.h
/usr/include/ola/rdm/RDMMessagePrinters.h
/usr/include/ola/rdm/RDMPacket.h
/usr/include/ola/rdm/RDMReply.h
/usr/include/ola/rdm/RDMResponseCodes.h
/usr/include/ola/rdm/ResponderHelper.h
/usr/include/ola/rdm/ResponderLoadSensor.h
/usr/include/ola/rdm/ResponderOps.h
/usr/include/ola/rdm/ResponderOpsPrivate.h
/usr/include/ola/rdm/ResponderPersonality.h
/usr/include/ola/rdm/ResponderSensor.h
/usr/include/ola/rdm/ResponderSettings.h
/usr/include/ola/rdm/ResponderSlotData.h
/usr/include/ola/rdm/SensorResponder.h
/usr/include/ola/rdm/StringMessageBuilder.h
/usr/include/ola/rdm/SubDeviceDispatcher.h
/usr/include/ola/rdm/UID.h
/usr/include/ola/rdm/UIDAllocator.h
/usr/include/ola/rdm/UIDSet.h