import { IField } from "../interfaces";
import { FieldDecorator } from "./field";
export declare class OptionalDecorator extends FieldDecorator {
    constructor(options?: Partial<IField>);
}
/**
 * Alias of @field.
 *
 * ```ts
 * class Data {
 *
 *   @field({
 *     required: false,
 *   })
 *   firstName: string;
 *
 *   @optional lastName: string;
 * }
 * ```
 */
export declare const optional: ((data?: Partial<IField> | undefined, p?: string | undefined, i?: number | undefined) => (data?: object | Function | undefined, p?: string | undefined, i?: number | TypedPropertyDescriptor<any> | undefined) => any) & ((data?: object | Function | undefined, p?: string | undefined, i?: number | TypedPropertyDescriptor<any> | undefined) => any);