/**
 * Obtains the string value from different source types.
 * @param text The value from witch the string must be extracted.
 */
export declare function getString(text?: string | (() => string)): string;
export declare function startsWith(text: string | undefined, startsWith: string | undefined): boolean;
/**
 * Normalize a string to remove accents. Then, the normalize version will be used to make the comparison.
 * function convert to lowercase. *
 * @param {string} texte The string to normalize
 * @return {string} The string in lowercase with accent characters replace by non-accent one.
 */
export declare function normalizeString(str: string): string;
export declare const NBSP: string;
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