src/transformers/models/xlm_roberta/modeling_xlm_roberta.py/XLMRobertaEncoder/__init__
class XLMRobertaEncoder:    def __init__(self, config):
        super().__init__()
        self.config = config
        self.layer = nn.ModuleList([XLMRobertaLayer(config) for _ in range(config.num_hidden_layers)])
        self.gradient_checkpointing = False