import { IDataObject } from 'n8n-workflow';
export declare const isString: (val: unknown) => val is string;
export declare const isNumber: (val: unknown) => val is number;
export declare const isObject: (val: unknown) => val is IDataObject;
export declare const isArray: (val: unknown) => val is unknown[];
export declare function isStringArray(input: unknown): input is string[];