src/transformers/models/swin2sr/modeling_swin2sr.py/PixelShuffleUpsampler/forward
class PixelShuffleUpsampler:    def forward(self, sequence_output):
        x = self.conv_before_upsample(sequence_output)
        x = self.activation(x)
        x = self.upsample(x)
        x = self.final_convolution(x)

        return x