code: def get_registered_layer(name):
      
      ret = _LAYER_REGISTRY.get(name, None)
      if ret == _NameConflict:
          raise KeyError("Layer named '{}' is registered with `@layer_register` more than once!".format(name))
      return ret
docs: Args:
          name (str): the name of the layer, e.g. 'Conv2D'
      Returns:
          the wrapped layer function, or None if not registered.