keras/src/layers/rnn/stacked_rnn_cells.py/StackedRNNCells/get_config
class StackedRNNCells:    def get_config(self):
        cells = []
        for cell in self.cells:
            cells.append(serialization_lib.serialize_keras_object(cell))
        config = {"cells": cells}
        base_config = super().get_config()
        return {**base_config, **config}