Databinding - Adding some toString()'s for servicability

[Scott Kurz]

In playing around with recent DataBinding code I found it helpful to add the
following to

DefaultTransformerExtensionPoint.java, for each of the LazyPush/LazyPull
transformers

        public String toString() {
            StringBuffer sb = new StringBuffer(super.toString());
            sb.append(";className=").append(className);
            return sb.toString();
        }

so I can see the transform chain in, say, a debugger.

Maybe if one of the committers finds this valuable they could check this in?

Thanks,
Scott