export declare class StringUtils {
    isEmptyOrWhitespace(text: string): boolean;
    convertToOneWhitespace(text: string): string;
    removeFirstAndLastQuote(text: any): any;
    removeLineBreaks(text: string): string;
    joinLines(text: string | string[], separator?: string): string;
    nbspGenerator(repetition?: number): string;
    getBetweenChars(text: string, startDelimiter: string, endDelimiter: string): string | null;
    stringify(obj: unknown): string;
    safeStringify(obj: unknown): string;
}