Passing a sting as 'in char[]' yields "immutable is not callable using argument types ()"

[chmike via Digitalmars-d-learn]

>     final Tuple!(int,"value",bool,"hasValue") value(const 
> string name) { return nameImpl(value); }


Sorry, this is the error. It should have been

    final Tuple!(int,"value",bool,"hasValue") value(const
     string name) { return valueImpl(name); }