User sketch has to take care of defining different sets of communication functions for each of instances, that way one can ensure that right chip is addressed in case of multiplexer or right chip is enabled in case of level shifter.
I left those floats in because milliseconds are less confusing than 10x milliseconds. Allowed values are limited by chip itself, for one of timing functions it is 2.4ms-614.4ms, but for another one it is 2.4-7372.8ms, which translates to uint32_t if 10x the value is used. Anyway, if that becomes a problem, I will re-consider these things.