code: def forward(self, x):
      return self.blocks(x)
  
imports: import os
  import sys
  import pickle
  import numpy
  from copy import deepcopy
  import paddle
  import paddle.nn
  import paddle.nn.functional
  from medicalseg.cvlibs import manager
  from medicalseg.utils import utils
  from medicalseg.cvlibs import param_init
  from medicalseg.models import layers
  from tools.preprocess_utils import experiment_planner
label_desc: Use image node_id 2 for calling the StackedConvLayers obj's underlying member method code with example usage: obj.forward(x) and returns: self