040000 tree 930dc9ebcfa5f68fc00bcc0a6e4ff70a7f633a3d	core
040000 tree 2f28d5d717b3452ce528a13d972df2a1214243e5	event
040000 tree e4b6b460642406531f79dda6af01233306472ab0	http
040000 tree f7463c5a04ab8a7f493579bb1ea9144ab762f733	os