040000 tree 8e51c834b817193fec21b265b441a92b470d4a51	core
040000 tree 26ec5364d0cba3fa5e8b78cfcd7480dc6cae196c	event
040000 tree 3bd7649e210f4a0111655d58b4a3482fe7fd2a30	http
040000 tree 74c9201996c7dc0901576439cf031e391d6905ef	os