code: function _startShowAnimation(item, spec) {
          if (!item.halted) {
              var callback = item.showCallback;
              if (spec.transform) {
                  item.mod.setTransform(Transform.identity, item.options.show.transition, callback);
                  callback = undefined;
              }
              if (spec.opacity !== undefined) {
                  item.mod.setOpacity(1, item.options.show.transition, callback);
                  callback = undefined;
              }
              _startTransferableAnimations.call(this, item, callback);
          }
      }
docs: Starts the show animation whenever init has completed.