src/transformers/models/ibert/modeling_ibert.py/IBertEncoder/__init__
class IBertEncoder:    def __init__(self, config):
        super().__init__()
        self.config = config
        self.quant_mode = config.quant_mode
        self.layer = nn.ModuleList([IBertLayer(config) for _ in range(config.num_hidden_layers)])