code: def __init__(self, backbone, pretrained=None):
      super().__init__(backbone, pretrained)
      self.decoder = ResGuidedCxtAtten_Dec([2, 3, 3, 2])
  
imports: import paddle
  import paddle.nn
  import paddle.nn.functional
  from paddleseg.models import layers
  from paddleseg import utils
  from paddleseg.cvlibs import manager, param_init
  from ppmatting.models.layers import GuidedCxtAtten
label_desc: Use image node_id 1 to create a new GCA object from inherited base classes: GCABaseline with example: obj = GCA(backbone, pretrained)