src/transformers/models/regnet/modeling_regnet.py/RegNetEmbeddings/__init__
class RegNetEmbeddings:    def __init__(self, config: RegNetConfig):
        super().__init__()
        self.embedder = RegNetConvLayer(
            config.num_channels, config.embedding_size, kernel_size=3, stride=2, activation=config.hidden_act
        )
        self.num_channels = config.num_channels