NAME

       Bio::Graphics::Browser2::Region -- Provide method for fetching and manipulating regions

   $whole = $db->whole_segment ($segment,$settings);
       Given a detail segment, return the whole seq_id that contains it

   $region = $db->region_segment ($segment,$settings [,$whole]);
       Given a detail segment and the current settings, return the region centered on the
       segment. The whole segment can be passed if desired -- this will avoid a redundant lookup.