@Override
		public void propertyChange(PropertyChangeEvent evt) {
			GnuDemanglerFormat format = selector.getFormat();
			selector.reset(getTags());
			if (format.isAvailable(isDeprecatedDemangler())) {
				setValue(format);
				selector.setFormat(format);
			}
			else {
				setValue(GnuDemanglerFormat.AUTO);
			}
		}
A version of the demangler analyzer to handle GNU GCC symbols
Ghidra/Features/GnuDemangler/src/main/java/ghidra/app/plugin/core/analysis/GnuDemanglerAnalyzer.java