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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def entity_type_path(cls, project, entity_type):
 """Return a fully-qualified entity_type string."""

        return google.api_core.path_template.expand(
            'projects/{project}/agent/entityTypes/{entity_type}',
            project=project,
            entity_type=entity_type,
        )