040000 tree 3c973924ebbad22f7150b1b1e02b80af3676b3b6	bbr
040000 tree b52f432795ec8bc391081fa93372db21f4fb3c9f	bbsim
040000 tree 78ab026ff4740042459c217cfcf7e262f93871c6	bbsimctl
040000 tree 44cd31c8c054410b9601236b449824535b709c9b	common