@Override
	public Symbol[] getSymbols() {
		throw new UnsupportedOperationException();
	}
InstructionStub can be extended for use by tests. It throws an UnsupportedOperationException
for all methods in the Instruction interface. Any method that is needed for your test can then 
be overridden so it can provide its own test implementation and return value.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/listing/InstructionStub.java