/usr/include/ is in libsocialweb-dev 0.25.20-6.
This file is owned by root:root, with mode 0o755.
..
/usr/include/libsocialweb/
/usr/include/libsocialweb/libsocialweb-keystore/
/usr/include/libsocialweb/libsocialweb-keystore/sw-keystore.h
/usr/include/libsocialweb/libsocialweb-keyfob/
/usr/include/libsocialweb/libsocialweb-keyfob/sw-keyfob.h
/usr/include/libsocialweb/interfaces/
/usr/include/libsocialweb/interfaces/sw-query-ginterface.h
/usr/include/libsocialweb/interfaces/sw-contacts-query-ginterface.h
/usr/include/libsocialweb/interfaces/sw-status-update-ginterface.h
/usr/include/libsocialweb/interfaces/sw-avatar-ginterface.h
/usr/include/libsocialweb/interfaces/sw-photo-upload-ginterface.h
/usr/include/libsocialweb/interfaces/sw-banishable-ginterface.h
/usr/include/libsocialweb/interfaces/sw-video-upload-ginterface.h
/usr/include/libsocialweb/interfaces/sw-collections-ginterface.h
/usr/include/libsocialweb/libsocialweb/
/usr/include/libsocialweb/libsocialweb/sw-cacheable.h
/usr/include/libsocialweb/libsocialweb/sw-types.h
/usr/include/libsocialweb/libsocialweb/sw-service.h
/usr/include/libsocialweb/libsocialweb/sw-online.h
/usr/include/libsocialweb/libsocialweb/sw-contact-view.h
/usr/include/libsocialweb/libsocialweb/sw-item-view.h
/usr/include/libsocialweb/libsocialweb/sw-item-stream.h
/usr/include/libsocialweb/libsocialweb/sw-debug.h
/usr/include/libsocialweb/libsocialweb/sw-web.h
/usr/include/libsocialweb/libsocialweb/sw-set.h
/usr/include/libsocialweb/libsocialweb/sw-cache.h
/usr/include/libsocialweb/libsocialweb/sw-contact.h
/usr/include/libsocialweb/libsocialweb/sw-item.h
/usr/include/libsocialweb/libsocialweb/sw-module.h
/usr/include/libsocialweb/libsocialweb/sw-utils.h
/usr/include/libsocialweb/libsocialweb/sw-client-monitor.h
/usr/include/libsocialweb/libsocialweb/sw-enum-types.h
/usr/include/libsocialweb/libsocialweb/sw-core.h