code: def _check_registry_type(folder=None):
      
  
      folder = _registry_folder(folder)
  
      default_file = os.path.join(folder, 'registry_type.txt')
  
      try:
          with open(default_file, "r") as infile:
              data = infile.read()
              data = data.strip()
  
              ComponentRegistry.SetBackingStore(data)
      except IOError:
          pass
docs: Check if the user has placed a registry_type.txt file to choose the registry type
  
      If a default registry type file is found, the DefaultBackingType and DefaultBackingFile
      class parameters in ComponentRegistry are updated accordingly.
  
      Args:
          folder (string): The folder that we should check for a default registry type