040000 tree 506d29a0914e6ebae611ab1c9a29b93cc3c473fb	echo2_client_cpp
040000 tree 67b659dc7e8a62edc9d49416ad1db75a8c63dcd7	echo2_client_go
040000 tree 2890812ed8303da8b888e31312958e969451eecb	echo2_client_rust
040000 tree 3c708ecf107efc855392f7c3b6a8a3ae900b9925	echo2_server_c
040000 tree 1a8476741dfa513ca2abcf29b784110b8b11e905	echo2_server_cpp
040000 tree b1c061f40c8ca35b442301443e164a362abd47b5	echo2_server_go
040000 tree 85868e2f04892414236831ce397ea10f4cdf5a3f	echo2_server_rust
040000 tree 609e6d3dc5e431feb5aa4e130b5b7e197b4a0056	services