code: def postprocess(self):
      return self.model
  
file_path: colossalai/colossalai/shardformer/policies/sam.py
imports: import colossalai.shardformer.layer
  from ..modeling.sam import forward_fn, get_sam_flash_attention_forward, get_sam_vision_flash_attention_forward
  from .base_policy import ModulePolicyDescription, Policy, SubModuleReplacementDescription
label_desc: Use image node_id 4 for calling the SamPolicy obj's underlying member method code with example usage: obj.postprocess() and returns: self