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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 data(self):
 """Get the data, after performing post-processing if necessary."""

        data = super(DynamicListSerializer, self).data
        processed_data = ReturnDict(
            SideloadingProcessor(self, data).data,
            serializer=self
        ) if self.child.envelope else ReturnList(
            data,
            serializer=self
        )
        processed_data = post_process(processed_data)
        return processed_data