import { OpenAPIV3 } from 'openapi-types';
export declare abstract class Format<ReturnType> {
    abstract schema: OpenAPIV3.SchemaObject;
    abstract formatter(value: any): ReturnType;
}
export declare class DateTimeFormat extends Format<Date | undefined> {
    schema: OpenAPIV3.NonArraySchemaObject;
    formatter(value: any): Date | undefined;
}