import type { PrototypeStruct } from '../index.js';
export declare function isAnyString(s: any): s is string;
interface IsString {
    isString(s: any): boolean;
}
export declare const isString: PrototypeStruct;
declare global {
    interface StringConstructor extends IsString {
    }
}
export {};
//# sourceMappingURL=is-string.d.ts.map