@Override
	public void decode(Decoder decoder, SleighLanguage sleigh) throws DecoderException {
//		int element = decoder.openElement(ELEM_EPSILON_SYM);
		decoder.closeElement(ELEM_EPSILON_SYM.id());
		// Nothing to do
	}
A pattern with no semantic or printing content, that will match
any pattern.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/app/plugin/processors/sleigh/symbol/EpsilonSymbol.java