code: function(rows){
  			arrUnits = rows.map(function(row) { return row.unit; });
  			profiler.stop('mc-wc-descendants-initial');
  			goDown([objEarlierUnitProps.unit]);
  		}
docs: "SELECT unit FROM units WHERE latest_included_mc_index>=? AND main_chain_index<=?", [objEarlierUnitProps.main_chain_index, to_main_chain_index],