src/transformers/models/informer/modeling_informer.py/InformerConvLayer/__init__
class InformerConvLayer:    def __init__(self, c_in):
        super().__init__()
        self.downConv = nn.Conv1d(
            in_channels=c_in,
            out_channels=c_in,
            kernel_size=3,
            padding=1,
            padding_mode="circular",
        )
        self.norm = nn.BatchNorm1d(c_in)
        self.activation = nn.ELU()
        self.maxPool = nn.MaxPool1d(kernel_size=3, stride=2, padding=1)