protected void setDefaultReturnAddressIfNeeded(PrototypeModel model) {
		if (model.getReturnAddress() == null) {
			Varnode[] retAddr =
				(returnAddress == null) ? new Varnode[0] : new Varnode[] { returnAddress };
			model.setReturnAddress(retAddr);
		}
	}
Sets the {@code returnaddress} of {@code model} to the {@code returnAddress}
of {@code this} if the model does not have a return address set.
@param model prototype
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/lang/BasicCompilerSpec.java