Method getMaxSize

libraries/PinInGroup/PinInGroup.h:45–45

  uint8_t   isInGroup(uint8_t pin);
  uint8_t   size()       { return _size; };
  uint8_t   getMaxSize() { return PININGROUP_MAXSIZE; };
  //  check how many "slots" are available
  uint8_t   available()  { return PININGROUP_MAXSIZE - _size; };