040000 tree ca5aba63fd6b58f674dc570ac3bbe1f9ee6a039c	core
040000 tree 4cfb756290f6aaac68a6050562602eadfb6b753d	event
040000 tree 68336acfe7291c6b09445c4c59efb5e7519fb828	http
040000 tree 33c369276d300dc9c1448bd4ae93290d99ab1b38	os