auto a = UInt!128.fromHexString("afbbfae3cd0aff2714a1de7022b0029d"); assert(a.bt(127) == 1); assert(a.bt(126) == 0); assert(a.bt(125) == 1); assert(a.bt(124) == 0); assert(a.bt(0) == 1); assert(a.bt(1) == 0); assert(a.bt(2) == 1); assert(a.bt(3) == 1);