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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 add_documents(self, docs):
 """Update dictionary from a collection of documents. Each document is a list of tokens. Args: docs (list):
 documents to add. """

        for sent in docs:
            sent = map(self.process_token, sent)
            self._token_count.update(sent)