GeoServerFeatureStore implements FeatureStore not FeatureSource

GeoServerFeatureStore appears to directly implement FeatureStore, but is indicated as implementing FeatureSource. This typo? causes transaction requests to fail when cascading a WFS request as GeoServer does not think GeoServerFeatureStore implements the pre-requisite transaction methods.

Simply changing "implements FeatureSource" to "implements FeatureStore" allowed my cascaded WFS transaction request to succeeed.