040000 tree 43798ce91656ebcfbfea78c8bf90c6005c51085a	greeter_client
040000 tree b91239cfb3362305d0a04b8640d019434b4f107c	greeter_server
040000 tree ab135b40364fc87c05e00ce203cbd92535cf6225	helloworld
040000 tree 9f4bf1e1c2f215ca238eecb67e2fd0e56575e5ba	mock_helloworld