export declare const stringAt: (str: string, index: number) => string | undefined;
export declare function stringMatchAll(str: string, regexp: RegExp): IterableIterator<RegExpMatchArray>;
export declare const stringPadEnd: (str: string, targetLength: number, padString?: string) => string;
export declare const stringPadStart: (str: string, targetLength: number, padString?: string) => string;
export declare const stringReplaceAll: (str: string, searchValue: string | RegExp, replaceValue: string | ((match: string, ...args: unknown[]) => string)) => string;
export declare const stringTrimStart: (str: string) => string;
export declare const stringTrimEnd: (str: string) => string;
export declare const stringTrimLeft: (str: string) => string;
export declare const stringTrimRight: (str: string) => string;