src/transformers/models/longt5/modeling_longt5.py/LongT5LayerNorm/__init__
class LongT5LayerNorm:    def __init__(self, hidden_size, eps=1e-6):
        """
        Construct a layernorm module in the LongT5 style. No bias and no subtraction of mean.
        """
        super().__init__()
        self.weight = nn.Parameter(torch.ones(hidden_size))
        self.variance_epsilon = eps