@Override
	public void finishInstruction() {
		assertMidInstruction();
		executor.finish(frame, getUseropLibrary());
		advanceAfterFinished();
	}
Extension point: Behavior when a p-code userop definition is not found

@param op the op
@param opName the name of the p-code userop
@return true if handle, false if still undefined
Ghidra/Framework/Emulation/src/main/java/ghidra/pcode/emu/DefaultPcodeThread.java