docs: def next_minifat(self, current):
          """
          Helpers provides access to next mini-FAT sector and returns it's
          seekable position. Should not be called from external code.
          """
          position = 0
          sector_size = self.header.sector_size // 4
          sector = self.header.minifat_sector_start
  
          while sector != ENDOFCHAIN and (position + 1) * sector_size <= current:
              sector = self.next_fat(sector)
              position += 1
  
          if sector == ENDOFCHAIN:
              return ENDOFCHAIN
  
          minifat_position = (sector + 1) << self.header.sector_shift
          minifat_position += (current - position * sector_size) * 4
  
          return self.get_long(minifat_position)