export interface SlugifyOptions {
    /**
     * Default: `-`
     */
    separator?: string;
    /**
     * Default: true
     */
    lowercase?: boolean;
    /**
     * Default: true
     */
    decamelize?: boolean;
    /**
     * Default: []
     */
    preserveCharacters?: string[];
}
export declare function _slugify(s: string, opt?: SlugifyOptions): string;