code: public DBCursor<T> addSpecial(String name, Object o) {
          cursor.addSpecial(name, o);
          return this;
      }
docs: adds a special operator like $maxScan or $returnKey
  e.g. addSpecial( "$returnKey" , 1 )
  e.g. addSpecial( "$maxScan" , 100 )
  
  @param name The name
  @param o    The object
  @return This object