code: function( objs, callback ) {
              var me = this;
              var saved = [];
              for ( var i = 0, il = objs.length; i < il; i++ ) {
                  me.save( objs[i], function( obj ) {
                      saved.push( obj );
                      if ( saved.length === il && callback ) {
                          me.lambda( callback ).call( me, saved );
                      }
                  });
              }
              return this;
          }
docs: batch save array of objs