code: def forward(self, x):
      x = self.up(x)
      r = x
      x = self.conv1(x)
      x = self.act(x)
      x = self.conv2(x)
      x = self.act(x + self.conv_res(r))
      return x
  
imports: import torch
  import torch.nn
  import torchvision
  import numpy
  import torch
  from torch.nn.functional import silu
  from einops import rearrange, repeat
  from utils.general_utils import matrix_to_quaternion, quaternion_raw_multiply
  from utils.graphics_utils import fov2focal
label_desc: Use image node_id 2 for calling the UpscalingBlock obj's underlying member method code with example usage: obj.forward(x) and returns: x