import { PotionBase } from './potion';
import { Item } from './item';
export declare function potionInstance(ctor: typeof Item): PotionBase;
export declare function decorateCtorWithPotionInstance(ctor: typeof Item, instance: any): void;
export declare function potionURI(ctor: typeof Item): string;
export declare function decorateCtorWithPotionURI(ctor: typeof Item, uri: string): void;
export declare function potionPromise(potion: PotionBase): typeof Promise;
export declare function setPotionPromise(ctor: typeof PotionBase, promise: any): void;
export declare function isReadonly(ctor: any, key: string): boolean;
/**
 * Mark a resource property as readonly and omit when saved.
 *
 * @example
 * class User extends Item {
 *     @readonly
 *     age;
 * }
 */
export declare function readonly(target: any, property: string): void;