code: def forward(self, x):
      """Shift to time-first, pass layers, then back to batch-first."""
      x = x.transpose(0, 1)
      for layer in self.layers:
          x = layer(x)
          if isinstance(x, tuple):
              x = x[0]
      x = x.transpose(0, 1)
      return x
  
imports: import torch
label_desc: Use image node_id 2 for calling the CustomModel obj's underlying member method code with example usage: obj.forward(x) and returns: x