open source driving agent
				
			 
			
		 
		
		
		
		
		
		
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							class Freezable:
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							  _frozen: bool = False
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							  def freeze(self):
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							    if not self._frozen:
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							      self._frozen = True
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							  def __setattr__(self, *args, **kwargs):
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							    if self._frozen:
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							      raise Exception("cannot modify frozen object")
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							    super().__setattr__(*args, **kwargs)
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