public List<String> getRegisterNames() {
		return registerNames;
	}
Get an alphabetical sorted unmodifiable list of original register names (including context
registers). Names correspond to orignal register name and not aliases which may be defined.

@return alphabetical sorted unmodifiable list of original register names.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/lang/RegisterManager.java