filter 'relevanssi_results'

I wonder, what ‘relevanssi_results’ filter is for.
it is defined as
apply_filters(‘relevanssi_results’, $doc_weight);
so only a weight is considered, but no way how to get what is the weight for. It should be imo something like

apply_filters(‘relevanssi_results’, array($doc_weight, $match, $relevanssi_post_array[$match]));

if it should have some use.

http://wordpress.org/extend/plugins/relevanssi/