import { InkStory } from './InkStory';
type ExternalFn = (...args: unknown[]) => unknown;
type ExternalResolver = (id: string) => ExternalFn | undefined;
export declare class Externals {
    private static _functions;
    private static _resolver?;
    static get functions(): Map<string, ExternalFn>;
    static setResolver(resolver: ExternalResolver): void;
    static add(id: string, func: ExternalFn): void;
    static get(id: string): ExternalFn | undefined;
    static bind(ink: InkStory, id: string): void;
    static clear(): void;
}
export {};