040000 tree 1aa4387e199130f286a185da617542dc467ef1bc	bbr
040000 tree 53f5b7a6445d4c76dd9b4aa4974c8725d02896ae	bbsim
040000 tree 2e40d8ead4f6b45eedef3c01b42d89530d9eb9e4	bbsimctl
040000 tree 5876a8b263ca4deeb69526d7131dad299b3aad4a	common