export declare const isType: (value: unknown, type: string) => boolean;
export declare const isDateTime: (value: unknown) => value is Date;
export declare const isNumber: (value: unknown) => value is number;
export declare const isString: (value: unknown) => value is string;
export declare const isBoolean: (value: unknown) => value is boolean;
export declare const isObject: (value: unknown) => value is object;
export declare const isFunction: (value: unknown) => value is Function;
export declare const isArray: (arg: any) => arg is any[];