code: def __init__(self, feature_channel=256):
      nn.Module.__init__(self)
  
      self.feature_channel = feature_channel
      self.head_layer = self.create_head_layer()
  
      self.pred_layers = nn.ModuleDict(self.create_pred_layers())
  
imports: import torch
  import torch.nn
  import torch.nn.functional
  from backbones.upsample_head import SimpleUpsampleHead
label_desc: Use image node_id 1 to create a new SimpleDetectionDecoder object from inherited base classes: nn with example: obj = SimpleDetectionDecoder(feature_channel)