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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 project(self, term_doc_mat, x_dim=0, y_dim=1):
        '''
        Returns a projection of the categories

        :param term_doc_mat: a TermDocMatrix
        :return: CategoryProjection
        '''
        return self._project_category_corpus(self._get_category_metadata_corpus(term_doc_mat),
                                             x_dim, y_dim)