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> concat_func Can you say more details how to use in the DeepFM. In the docs, I can't find how to use it. The source with DeepFM in the next...

> For example, you can concatenate two embeddings in this way: > > ```python > group_embedding_dict, dense_value_list = input_from_feature_columns(features, dnn_feature_columns, l2_reg_embedding, > seed, support_group=True) > a = group_embedding_dict['default_group'][0] # (?,...