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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 put_encryption_materials(self, cache_key, encryption_materials, plaintext_length, entry_hints=None):
 """Does not add encryption materials to the cache since there is no cache to which to add them. :param bytes cache_key: Identifier for entries in cache :param encryption_materials: Encryption materials to add to cache :type encryption_materials: aws_encryption_sdk.materials_managers.EncryptionMaterials :param int plaintext_length: Length of plaintext associated with this request to the cache :param entry_hints: Metadata to associate with entry (optional) :type entry_hints: aws_encryption_sdk.caches.CryptoCacheEntryHints :rtype: aws_encryption_sdk.caches.CryptoMaterialsCacheEntry """

        return CryptoMaterialsCacheEntry(cache_key=cache_key, value=encryption_materials)