pub fn decode_issy_short(bytes: [u8; 2]) -> Option<Issy>Expand description
Decode a 2-byte (short) ISSY field.
Returns Some(Issy::IscrShort) when the short-form bit (bit 7 of byte 0) is
0; None otherwise (a 1 prefix means a long-form field, which is 3 bytes
and must be decoded with decode_issy_long).