src/transformers/models/lxmert/modeling_lxmert.py/LxmertPredictionHeadTransform/__init__
class LxmertPredictionHeadTransform:    def __init__(self, config):
        super(LxmertPredictionHeadTransform, self).__init__()
        self.dense = nn.Linear(config.hidden_size, config.hidden_size)
        self.transform_act_fn = ACT2FN[config.hidden_act]
        self.LayerNorm = nn.LayerNorm(config.hidden_size, eps=1e-12)