protected String stringifyUseropUnchecked(Language language, int id) {
		if (!(language instanceof SleighLanguage)) {
			throw new RuntimeException("Expected Sleigh language for CALLOTHER op");
		}
		return ((SleighLanguage) language).getUserDefinedOpName(id);
	}
Lookup a given userop name

@param language the language containing the userop
@param id the userop id
@return the display string, i.e., its name, or null if it doesn't exist
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/app/util/pcode/AbstractAppender.java