import type { SchemaArrayValue, SchemaValue } from "../core/index.js";
type ArrayAssert<T extends SchemaValue> = (arr: SchemaArrayValue | null | undefined) => asserts arr is T[] | undefined;
export declare const assertStrings: ArrayAssert<string>;
export declare const assertFiles: ArrayAssert<File>;
export declare function assertFile(v: unknown): asserts v is File | undefined;
export {};