040000 tree 8e8fcfd002ee137d872c2db751c5d5b8a9ade78e	ietfyang
040000 tree 18b202de2d72b5a58de25199f2693a737b8440a8	parser
040000 tree b8337dcf3ed0c737ea723d07b897e72044f78033	plugin
040000 tree 61840f1abf3ef3a78d9d13c48aed1ab3b8ee2a7f	translator
040000 tree 4bed548faa2049ba455cb3eb974f8ddc792c73f9	utils