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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get(self, identifier, default=None):
 """Get a layer in the Overlay. Get a particular layer in the Overlay using its path string or an integer index. Args: identifier: Index or path string of the item to return default: Value to return if no item is found Returns: The indexed layer of the Overlay """

        if isinstance(identifier, int):
            values = list(self.data.values())
            if 0 <= identifier < len(values):
                return values[identifier]
            else:
                return default
        return super(Overlay, self).get(identifier, default)