040000 tree daa7f41c53d339236fb96069c3e0d7e4d84f4b69	core
040000 tree f86b919ee9f8543bb8cf1a4c67c0432efb8f352d	event
040000 tree 0440c136f7f069d9bab315ae3d202af4c6f515c1	http
040000 tree ab8a63eed25df2aaead311b54e4a74facae676f9	os