docs: def util_srcpanid_present(pkt):
      '''A source PAN ID is included if and only if both src addr mode != 0 and PAN ID Compression in FCF == 0'''  # noqa: E501
      if (pkt.underlayer.getfieldval("fcf_srcaddrmode") != 0) and (pkt.underlayer.getfieldval("fcf_panidcompress") == 0):  # noqa: E501
          return True
      else:
          return False