@Override
public void validate(PropertyReference expr) throws InvalidExpressionException {
if (expr.size() != 1 || !getData().containsKey(expr.getRoot())) {
throw new InvalidExpressionException(
"No property on $Locale for key: " + expr, expr.getLocation());
}
}
@Override
public Object getValue(PropertyReference expr) {
return getData().get(expr.getRoot());
}
