hm, no, that's exactly what i don't want. i never want to
have the main code say:
$trans = new TransactionA
i want to say
$trans = new Transaction($request);
and have $trans be an instance of TransactionA or
TransactionB. i'm not up on oo terminology, but i think
what i really want is a TransactionFactory class.
again, i'm not sure but the above describes what i'm looking
for. i'm just wondering if it's a good thing to look for
or is there a better design to use?
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