040000 tree 1cf6af7e559f6599b0d1488bc92cbb0ecf38d76b	api
040000 tree 071032ead7bdbc0921f2a034198352896ec8615d	appengine
040000 tree 8a391794c84d22f9a37bb6ecca0dbadc5a3ac1ce	cloud
040000 tree 1f0d8e64e32e10cf88f2830473fac1cd4f017010	grpc