/usr/include/odil/message/ is in libodil0-dev 0.7.3-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/odil/message/CEchoRequest.h
/usr/include/odil/message/CEchoResponse.h
/usr/include/odil/message/CFindRequest.h
/usr/include/odil/message/CFindResponse.h
/usr/include/odil/message/CGetRequest.h
/usr/include/odil/message/CGetResponse.h
/usr/include/odil/message/CMoveRequest.h
/usr/include/odil/message/CMoveResponse.h
/usr/include/odil/message/CStoreRequest.h
/usr/include/odil/message/CStoreResponse.h
/usr/include/odil/message/Cancellation.h
/usr/include/odil/message/Message.h
/usr/include/odil/message/Request.h
/usr/include/odil/message/Response.h