/**
 * Finds all indexes of a `searchFor` string or RegExp in `searchIn`. Ths is similar to
 * [`''.indexOf`](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String/indexOf)
 * except that it finds _all_ indexes of.
 *
 * @category String
 * @category Package : @augment-vir/common
 * @package [`@augment-vir/common`](https://www.npmjs.com/package/@augment-vir/common)
 */
export declare function findSubstringIndexes<IncludeLength extends boolean | undefined>({ searchIn, searchFor, caseSensitive, includeLength, }: {
    searchIn: string;
    searchFor: string | RegExp;
    caseSensitive: boolean;
    /** Set to true to get an array of objects with the found indexes _and_ their lengths. */
    includeLength?: IncludeLength;
}): IncludeLength extends true ? {
    index: number;
    length: number;
}[] : number[];