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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 cache_intermediate_result(cls, result, readable_name=None):
 """Add result to the cached data. Parameters result : LazyResult Data to cache. readable_name : str Will be used when generating a name for this intermediate result. Returns ------- str A generated placeholder name uniquely identifying this intermediate result. """

        from .lazy_result import LazyResult
        assert isinstance(result, LazyResult)

        dependency_name = Cache._generate_placeholder(readable_name)
        Cache._intermediate_results[dependency_name] = result

        return dependency_name