adding custom fields to solr response

[Rohit Harchandani]

Hi,
I have created a custom component with some post filtering ability. Now I
am trying to add certain fields to the solr response. I was able to add it
as a separate response section, but i am having difficulty adding it to the
docs themselves. Is there an example of any component which adds fields to
the docs using DocTransformer ?
Thanks,
Rohit