JPAWeavingHook tr = (JPAWeavingHook) TransformerRegistryFactory.getTransformerRegistry();
//Add a transforme and check it gets called to weave
tr.addTransformer(b1, ct1a, provider1);
//Check a second weaver isn't called for a when the first gives a result
tr.addTransformer(b1, ct1b, provider1);
ProtectionDomain pd = new ProtectionDomain(null, null);
byte[] bytes = new byte[] {(byte) 0xBE, (byte)0xAD};
byte[] returnedBytes = new byte[] {(byte) 0xBA, (byte)0xDE};