I think it is $product, no ?
Merge pull request #33 from aRn0D/fix

I think it is $product, no ?
Fixed #9
Merge pull request #34 from umpirsky/fix/issue-9

Fixed #9
Update installation.rst

We must include "use Doctrine\ORM\EntityManager" in ItemResolver otherwise it will try to resolve EntityManager manager in the current namespace of App/AppBundle/Cart/. 

Without 'use Doctrine\ORM\EntityManager' the following error is produced: PHP Catchable fatal error:  Argument 1 passed to app\AppBundle\Cart\ItemResolver::__construct() must be an instance of app\AppBundle\Cart\EntityManager, instance of EntityManager51cc9f23a10c7_546a8d27f194334ee012bfe64f629947b07e4919\\__CG__\\Doctrine\\ORM\\EntityManager given.
Update installation.rst

Added second occurrence of use Doctrine\ORM\EntityManager;
Merge pull request #35 from gregsomers/patch-1

Update installation.rst
Fixed typos
Merge pull request #36 from pborreli/typos

Fixed typos
Fixed bundle name
Added overriding guides for SyliusProductBundle
Merge pull request #41 from Sylius/product-bundle

More SyliusProductBundle docs
Merge pull request #37 from amenophis/master

Change SyliusCustomizableProductBundle to SyliusVariableProductBundle
Add simple introduction to bundles
Update introduction.rst
Update introduction.rst
Update index.rst
Update installation.rst
Update show_resource.rst
Update index_resources.rst