import { FieldConstraintProcedureOptions } from "../../../models/interfaces/field-constraint-procedure-options";
import { MessageBuilderFn } from "../../../models/interfaces/message-builder-fn";
import { FieldConstraintFn } from "../../../models/interfaces/field-constraint-fn";
export declare const REQUIRED = "required";
export declare const required: FieldConstraintFn<{}>;
export declare const requiredMessageBuilder: MessageBuilderFn;
export declare function Required(options?: FieldConstraintProcedureOptions): PropertyDecorator;