SLING-6258 - The PackageAdminClassLoader cannot load classes from bundles providing older API versions * check all bundles providing the same API package when trying to solve a class / resource and return the first non-null result; this will always return the class / resource with the highest API version
sling/trunk/bundles/commons/classloader/src/main/java/org/apache/sling/commons/classloader/impl/PackageAdminClassLoader.java