Multiple versions of same class through OSGI bundles

We are trying to create two different versions of same OSGI bundles. On changing only the version, the newer version bundle overrides the older version bundle.

We can not see two different versions bundles in Adobe system console.

Our purpose is to read the classes created in same package in multiple version of the bundle.

We have used @reference annotation for targeting the class files with some properties values. But we are unable to read different class files with this approach.

Have any one tried to use multi version capability of OSGI framework?