100644 blob 80ccce8b0e13b2fd770febc524c61fb8bf7dba4e	1.cc
100644 blob a58da3df20cc515b7690f9c94f559dcae45bb5d9	2.cc
040000 tree acb045da6fc15bead16348f24f53803bcd9ee6c6	basic_ops
040000 tree 21a2ddcf6068d2e85e2949075a7774c1fb39f954	requirements
040000 tree 9ef5095464bb0d44da267eb974ae8ce2b87ef1e6	sync_ops