import type { Streamable } from '@rimbu/stream';
import type { VariantMultiSetBase } from '@rimbu/multiset/custom';
/**
 * A type-variant immutable MultiSet of value type T.
 * In the MultiSet, each value can occur multiple times.
 * See the [MultiSet documentation](https://rimbu.org/docs/collections/multiset) and the [VariantMultiSet API documentation](https://rimbu.org/api/rimbu/multiset/VariantMultiSet/interface)
 * @typeparam T - the value type
 * @note Type-variance means that both the value type
 * can be widened in a type-safe way without casting.
 * @note As a consequence of being variant, the type does not contain methods that (can) add new elements
 * to the collection.
 */
export interface VariantMultiSet<T> extends VariantMultiSetBase<T, VariantMultiSet.Types> {
}
export declare namespace VariantMultiSet {
    /**
     * A non-empty type-variant immutable MultiSet of value type T.
     * In the MultiSet, each value can occur multiple times.
     * See the [MultiSet documentation](https://rimbu.org/docs/collections/multiset) and the [VariantMultiSet API documentation](https://rimbu.org/api/rimbu/multiset/VariantMultiSet/interface)
     * @typeparam T - the value type
     * @note Type-variance means that both the value type
     * can be widened in a type-safe way without casting.
     * @note As a consequence of being variant, the type does not contain methods that (can) add new elements
     * to the collection.
     */
    interface NonEmpty<T> extends VariantMultiSetBase.NonEmpty<T, VariantMultiSet.Types>, Omit<VariantMultiSet<T>, keyof VariantMultiSetBase<any, any>>, Streamable.NonEmpty<T> {
    }
    /**
     * Utility interface that provides higher-kinded types for this collection.
     */
    interface Types extends VariantMultiSetBase.Types {
        readonly normal: VariantMultiSet<this['_T']>;
        readonly nonEmpty: VariantMultiSet.NonEmpty<this['_T']>;
    }
}