@Deprecated public interface IGroupByKeyComputerDeprecated.Part of the old ('classic') search result view. Since 3.0 clients can create their own search result view pages (see
ISearchResultPage), leaving it up to the page how to group search results.Computes the key by which the markers in the search result view are grouped.
Clients may implement this interface.
computeGroupByKeyDeprecated.Computes and returns key by which the given marker is grouped.
marker- the marker for which the key must be computed
- an object that will be used as the key for that marker,
nullif the marker seems to be invalid