export declare function isString(v: unknown): v is string;
export declare function isArrayOf<T extends "string" | "number" | "object" | "boolean" | "any", O extends Record<string, unknown> = Record<string, unknown>>(of: T, v: unknown): v is (T extends "string" ? string[] : T extends "number" ? number[] : T extends "object" ? O : unknown[]);