Merge "Check ManagedResource is NonNull before Checking Owner"

        T get(int key) {

            T val = mArray.get(key);

            // The value should never be null unless the resource doesn't exist

            // (since we do not allow null resources to be added).

            if (val != null) {

                val.checkOwnerOrSystemAndThrow();

            }

            return val;

        }