transformers.RobertaConfig
https://huggingface.co/docs/transformers/model_doc/roberta#transformers.RobertaConfig
The RobertaConfig class directly inherits BertConfig.
https://github.com/huggingface/transformers/blob/v4.18.0/src/transformers/models/roberta/configuration_roberta.py#L37
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transformers.BertConfig
Configuration objects inherit from PretrainedConfig (...)