code: def forward(self, x):
      x = self.context(x)
      return self.out(x)
  
imports: import torch
  import torch.nn
  import torch.nn.functional
  from pywick.models.segmentation.da_basenets.segbase import SegBaseModel
  from pywick.models.segmentation.da_basenets.fcn import _FCNHead
label_desc: Use image node_id 2 for calling the _OCHead obj's underlying member method code with example usage: obj.forward(x) and returns: self