code: def forward(self, season, trend, enc_output):
      for lin in self.dec_lins:
          season, trend_part = lin(season, enc_output)
          trend = trend + trend_part
      return season, trend
  
imports: import pgl
  import paddle
  import paddle.nn
  import paddle.nn.functional
  import numpy
  from pgl.utils.logger import log
  import pgl.nn
  import math
label_desc: Use image node_id 2 for calling the Decoder obj's underlying member method code with example usage: obj.forward(season, trend, enc_output) and returns: season,  trend