/**
 * Helper function to check if a key of a table in the "save#.dat" file is a serialization brand
 * inserted by the save data manager (i.e. the `deepCopy` function).
 *
 * This is separated from the other serialization functions because end-users would not normally be
 * iterating through a serialized object directly.
 */
export declare function isSerializationBrand(key: unknown): boolean;
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