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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 _close_after_stream(self, response, chunk_size):
 """Iterate over the content and ensure the response is closed after."""

        # Yield each chunk in the response body
        for chunk in response.iter_content(chunk_size=chunk_size):
            yield chunk
        # Once we're done streaming the body, ensure everything is closed.
        response.close()