040000 tree d7a015c8aa8e70480c3130ab75a38bfda5685dcb	bbr
040000 tree d2771304c331b279895be19a1c019e99aa8f485f	bbsim
040000 tree ec66ac951a1d4a2dd7315265196f61fdd6ab967c	bbsimctl
040000 tree 112d0e7b3050cfdc453902ebfd00f81e6e94ba3b	common