import { ArrayOrIterable } from '../../util/ArrayOrIterable';
import { ChangeSetOperatorFunction } from '../ChangeSetOperatorFunction';
/**
 * Equivalent to a select many transform. To work, the key must individually identify each child.
 * @typeparam TDestination The type of the destination.
 * @typeparam TSource The type of the source.
 * @typeparam TSourceKey The type of the source key.
 * @typeparam TDestinationKey The type of the destination key.
 * @param manySelector The many selector.
 * @param keySelector The key selector which must be unique across all
 */
export declare function transformMany<TSource, TSourceKey, TDestination, TDestinationKey>(manySelector: (source: TSource) => ArrayOrIterable<TDestination>, keySelector: (destination: TDestination) => TDestinationKey): ChangeSetOperatorFunction<TSource, TSourceKey, TDestination, TDestinationKey>;