Returns all variant annotation sets on the server.

def getAllAnnotationSets(self):
        """
        Returns all variant annotation sets on the server.
        """
        for variantSet in self.getAllVariantSets():
            iterator = self._client.search_variant_annotation_sets(
                variant_set_id=variantSet.id)
            for variantAnnotationSet in iterator:
                yield variantAnnotationSet