import { ReferenceObject, SchemaObject } from '@nestjs/swagger/dist/interfaces/open-api-spec.interface';
import 'reflect-metadata';
import { IOptions } from './options';
/**
 * Either a plain JSON Schema object that gets merged into the existing schema,
 * or a function that receives as parameters the existing schema and global
 * options, returning an updated schema.
 */
export type DecoratorSchema = ReferenceObject | SchemaObject | ((source: SchemaObject, options: IOptions) => ReferenceObject | SchemaObject);
/**
 * Supplement class or property with additional JSON Schema keywords.
 *
 * @param schema JSON Schema object that is merged into the schema derived from
 * class-validator decorators. In case of conflicts, keywords defined here
 * overwrite the existing ones. Alternatively you can supply a function that
 * receives as parameters the existing schema and global options, returning an
 * updated schema.
 */
export declare function JSONSchema(schema: DecoratorSchema): (target: object | Function, key?: string) => void;
/**
 * Get the JSON Schema stored in given target's metadata.
 */
export declare function getMetadataSchema(target: object | Function, key: string): DecoratorSchema;