/**
 * Generates a unique identifier from a given input identifier.
 * This generated identifier hash will remain consistent for the tuple
 * (identifier, machine, user).
 *
 * @param  identifier Input Block identifier.
 * @param  significantChars Number of characters from the start of the hash to use.
 * @returns A GUID hash for the given Block identifier, sliced to the number of
 *          significant characters given.
 */
export declare function gen_guid(identifier: string, signifcantChars: number): string;
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