code: def train_forward(self, data):
      images = data["img"]
      net_out = self.model(images)
      return net_out
  
imports: import abc
  import paddle
  from paddlepanseg.core import infer
label_desc: Use image node_id 2 for calling the PanSegRunner obj's underlying member method code with example usage: obj.train_forward(data) and returns: net_out