export declare function headingLevel(header: string): number;
export declare function last<T>(arr: T[]): T | undefined;
export declare function hidden<B extends Record<string | symbol, unknown>, F extends string | symbol, V>(box: B, field: F, value: V): B & Record<F, V>;
export type Runtime = {
    script: string;
    style: string;
};
export declare function copyRuntime({ runtime, output }: {
    runtime: Runtime;
    output: string;
}, cache: Set<string>): void;
export declare function copy(from: string, to: string): void;
export declare function dynrequire(module: string): any;