import type { Mutator } from './types/outputs/Mutator.js';
import type { Observable } from './types/outputs/Observable.js';
import type { Ref } from './types/outputs/Ref.js';
/**
 * Builds an uninitialized mutable ref.
 *
 * @since 1.0.0
 */
export declare function var$<D>(): UninitializedVar<D>;
/**
 * Builds an initialized mutable ref.
 * @param initial
 *
 * @since 1.0.0
 */
export declare function var$<D>(initial: D): Var<D>;
export interface Var<in out D> extends Observable<D>, Ref<D>, Mutator<D, D> {
}
export interface UninitializedVar<in out D> extends Observable<D>, Ref<D | undefined>, Mutator<D, D> {
}