When calling KieContainerImpl.updateToVersion(ReleaseId), we sometimes experience a NullPointerException during a chained set of method calls that try to obtain a package, and then a rule within it.

If the package is null, a NullPointerException is thrown, because there is no check in place before that call to get the rule from the package.

To prevent this, a null check should be added to the package before trying to get the rule from it.