private synchronized void loadRegisterParameterList() {
		if (regParams != null)
			return;
		regParams = new ArrayList<Parameter>();
		try {
			Field[] keys = registerAdapter.getRegisterVariableKeys(functionRecord.getKey());
			for (int i = 0; i < keys.length; i++) {
				DBRecord varRec = registerAdapter.getRegisterVariableRecord(keys[i].getLongValue());
				regParams.add(getRegisterParameter(varRec, i));
			}
// TODO Does register variable list need to be sorted?
		}
		catch (IOException e) {
			functionManager.dbError(e);
		}
	}
Load the register variable/parameter list from the database.
@return register
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/oldfunction/OldFunctionDataDB.java