// sm.setVersion(version);
code.aload().setParam(0);
code.invokeinterface().setMethod(OpenJPAStateManager.class,
"getVersion", Object.class, null);
JumpInstruction ifins = code.ifnonnull();
code.aload().setParam(0);
code.aload().setThis();
code.getfield().setField("version", Object.class);
code.invokeinterface()
.setMethod(OpenJPAStateManager.class, "setVersion",
void.class, new Class[]{ Object.class });