FormBuilderTypeAhead<NonStringClass> bug

[awhitford]

I think this line is a bug:

        ? widget.selectionToTextTransformer(_initialValue ?? '')

I think it should be:

        ? widget.selectionToTextTransformer(_initialValue) ?? ''

I am getting a runtime exception:

type 'String' is not a subtype of type 'MyClass'

I'm confused because my code is very close to this example.

[awhitford]

This whole expression:

    _initialText = (widget.selectionToTextTransformer != null)
        ? widget.selectionToTextTransformer(_initialValue ?? '')
        : _initialValue?.toString() ?? '';

should really be:

    _initialText = ((widget.selectionToTextTransformer != null)
            ? widget.selectionToTextTransformer(_initialValue)
            : _initialValue?.toString()) ??
        '';

The existing code is illegal because selectionToTextTransformer has a parameter of type T, but the expression _initialValue ?? '' will transform a null value into a String instead of T.