code: def forward(self, x):
      gap = self.gap(x)
      bn = self.bn(gap)
      conv1 = self.add(self.conv_1x1(bn), x)
      return self.conv_3x3(conv1)
  
imports: import os
  import paddle
  import paddle.nn
  import paddle.nn.functional
  from paddleseg import utils
  from paddleseg.cvlibs import manager, param_init
  from paddleseg.models import layers
label_desc: Use image node_id 2 for calling the ContextEmbeddingBlock obj's underlying member method code with example usage: obj.forward(x) and returns: self