code: def forward(self, fake_text, fake_bg):
      fake_concat = paddle.concat((fake_text, fake_bg), axis=1)
      fake_concat_tmp = self._conv(fake_concat)
      output_res = self._res_block(fake_concat_tmp)
      fake_fusion = self._reduce_conv(output_res)
      return {"fake_fusion": fake_fusion}
  
imports: import paddle
  import paddle.nn
  from arch.base_module import MiddleNet, ResBlock
  from arch.encoder import Encoder
  from arch.decoder import Decoder, DecoderUnet, SingleDecoder
  from utils.load_params import load_dygraph_pretrain
  from utils.logging import get_logger
label_desc: Use image node_id 2 for calling the FusionGeneratorSimple obj's underlying member method code with example usage: obj.forward(fake_text, fake_bg) and returns: dict