/**
 * Removes common "noise" words from a name string and then simplifies the result.
 * Used to generate a stem for catching near-duplicate names
 * (e.g. "First National Bank" and "First National" would produce the same stem).
 *
 * Noise words removed: bank/banc/banco, банк, coop, express, gas/fuel, wireless, shop/store.
 *
 * @param   str - The input name string to stem
 * @returns A simplified, de-noised string. Returns an empty string if the input is not a string.
 */
export declare function stemmer(str?: string): string;
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