Assembles messages that start with a fixed sequence of zero or more magic
bytes followed by a single byte that indicates the length of the rest of
the packet.
null is accepted as a wildcard byte.
This transformer takes an incoming stream and splits it
along the "terminator" marks and returns a String! Great
for parsing incoming serial streams that end on \r\n.
wildcardFind searches the haystack for a copy of needle.
both needle and haystack must be Lists. Needle may
contain null's, that position is then treated as a wildcard.
