040000 tree 3c973924ebbad22f7150b1b1e02b80af3676b3b6	bbr
040000 tree 82113a519930779b23770ee9bc264c243b4c111a	bbsim
040000 tree 929ffdc2aa93e802487fcccff86d0200c68a804b	bbsimctl
040000 tree 44cd31c8c054410b9601236b449824535b709c9b	common