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040000 tree 2e9fbaa9a96604aac9f1bc1e131893cdcef19a61	echo
040000 tree 94690659cfe687d835c1d111930b57de3e7a99a4	echo_with_service_describer
040000 tree 08d382b484f283457426119187a18b359aa3dba7	interfaces
040000 tree 048b051830731afb2af5ecb2dc4219bb0cf40ab9	pingpong
040000 tree 29ff63a761ea950f06f78a4ddcdbd5a878fa3a4a	pingpong_target