Return a fully-qualified annotation_spec string.

def annotation_spec_path(cls, project, location, dataset, annotation_spec):
        """Return a fully-qualified annotation_spec string."""
        return google.api_core.path_template.expand(
            "projects/{project}/locations/{location}/datasets/{dataset}/annotationSpecs/{annotation_spec}",
            project=project,
            location=location,
            dataset=dataset,
            annotation_spec=annotation_spec,
        )