import 'reflect-metadata';
import { ChroniclePropertyDecorator } from '../../types/propertyDecoratorMetadata.js';
/** Metadata stored by the childrenFrom property decorator. */
export interface ChildrenFromMetadata {
    /** The event constructor that adds children to the collection. */
    readonly eventType: Function;
    /** Optional child type for TypeScript runtimes without emitted generic metadata. */
    readonly childType?: Function;
    /** The event property name used as the key for children. Defaults to the event source identifier. */
    readonly key?: string;
    /** The child model property name used to uniquely identify instances in the collection. */
    readonly identifiedBy?: string;
    /** The event property name used as the parent key. Defaults to the event source identifier. */
    readonly parentKey?: string;
}
/** Options for the options form of the childrenFrom property decorator. */
export interface ChildrenFromOptions {
    /** The child type, for TypeScript runtimes without emitted generic metadata. */
    readonly childType?: Function;
    /** The event property name used as the key for children. Defaults to the event source identifier. */
    readonly key?: string;
    /** The child model property name used to uniquely identify instances in the collection. */
    readonly identifiedBy?: string;
    /** The event property name used as the parent key. Defaults to the event source identifier. */
    readonly parentKey?: string;
}
/**
 * Property decorator that configures a children collection sub-projection from an event type.
 * Use this form to name the child type and an explicit child key together.
 * @param eventType - The event constructor.
 * @param options - The child type, key, identifiedBy and parentKey.
 * @returns A property decorator.
 */
export declare function childrenFrom(eventType: Function, options: ChildrenFromOptions): ChroniclePropertyDecorator;
/**
 * Property decorator that configures a children collection sub-projection from an event type.
 * @param eventType - The event constructor.
 * @param key - Optional event property name to use as the key for children, or the child constructor.
 * @param identifiedBy - Optional child model property name used to identify instances.
 * @param parentKey - Optional event property name used as the parent key.
 * @returns A property decorator.
 */
export declare function childrenFrom(eventType: Function, key?: string | Function, identifiedBy?: string, parentKey?: string): ChroniclePropertyDecorator;
/**
 * Retrieves all childrenFrom metadata stored on the given property.
 * @param target - The class prototype.
 * @param propertyKey - The property name.
 * @returns An array of childrenFrom metadata entries.
 */
export declare function getChildrenFromMetadata(target: object, propertyKey: string): ChildrenFromMetadata[];
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