import type { DomainObjectShape, Refable } from './Refable';
import type { RefByPrimary } from './RefByPrimary.type';
/**
 * creates a reference to a domain object by its primary key
 *
 * extracts only the primary key properties from a domain object instance
 *
 * note
 * - you may need to explicitly annotate the type for proper inference
 *   - e.g., `const ref = refByPrimary<typeof SeaTurtle>(turtle)`
 *   - automatic resolution of the relationship between instance and class.static properties is not yet possible in TypeScript
 *
 * @example
 * ```ts
 * const turtle = new SeaTurtle({ uuid: '1', seawaterSecurityNumber: '821', name: 'Crush' });
 * const ref = refByPrimary<typeof SeaTurtle>(turtle);
 * // ref = { uuid: '1' }
 * ```
 */
export declare const refByPrimary: <TDobj extends Refable<TShape, TPrimary, TUnique>, TShape extends DomainObjectShape = any, TPrimary extends readonly string[] = any, TUnique extends readonly string[] = any>(instance: InstanceType<TDobj>) => RefByPrimary<TDobj, TShape, TPrimary, TUnique>;