code: def forward(self, x):
      enjoy = self.ham_in(x)
      enjoy = F.relu(enjoy)
      enjoy = self.ham(enjoy)
      enjoy = self.ham_out(enjoy)
      ham = F.relu(x + enjoy)
  
      return ham
  
imports: import paddle
  import paddle.nn
  import paddle.nn.functional
  from paddleseg.cvlibs import manager
  from paddleseg.models.backbones.mscan import MSCAN
  from paddleseg.models.layers import NMF2D, ConvGNAct
  from paddleseg.utils import utils
label_desc: Use image node_id 2 for calling the Hamburger obj's underlying member method code with example usage: obj.forward(x) and returns: ham