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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 multiple_chunks(self, chunk_size=None):
 """ Returns ``True`` if you can expect multiple chunks. NB: If a particular file representation is in memory, subclasses should always return ``False`` -- there's no good reason to read from memory in chunks. """

        if not chunk_size:
            chunk_size = self.DEFAULT_CHUNK_SIZE
        return self.size > chunk_size