docs: def get_secchan_offs(type_, data):
      """http://git.kernel.org/cgit/linux/kernel/git/jberg/iw.git/tree/scan.c?id=v3.17#n927.
  
      Positional arguments:
      type_ -- corresponding `ieprinters` dictionary key for the instance.
      data -- bytearray data to read.
      """
      if data[0] < len(ht_secondary_offset):
          return "{0} ({1})".format(ht_secondary_offset[data[0]], data[0])
      return "{0}".format(data[0])