gadget_to_bdc
struct bdc *bdc = gadget_to_bdc(gadget);
struct bdc *bdc = gadget_to_bdc(gadget);
struct bdc *bdc = gadget_to_bdc(gadget);
struct bdc *bdc = gadget_to_bdc(gadget);
struct bdc *bdc = gadget_to_bdc(gadget);