/**
 * Builtin Toast adapter: the zero-dependency toast engine: a `ToastProvider`
 * that holds a queue and mounts a fixed bottom-right viewport, plus `useToast`.
 * Composes the presentational parts from `toast-parts.tsx` (structured
 * icon/action/cancel toasts, and `toast.custom` nodes). Imports ONLY the parts +
 * the contract types: never the `toast.tsx` skin or the adapter context: so
 * Toast can be adapter-routed without an import cycle. A Sonner adapter satisfies
 * the same `ToastParts` contract by mounting `<Toaster/>` instead.
 *
 * @module react/components/ui/adapter/builtin/toast
 */
import * as React from "react";
import type { ToastParts, ToastViewportProps } from "../contract.js";
/**
 * Fixed region (bottom-right) that stacks the queued toasts. The builtin
 * `ToastProvider` mounts one automatically, so you rarely render this yourself.
 * Exported (and aliased as `Toaster`) for advanced placement on the builtin engine.
 */
export declare function ToastViewport({ className, ref, ...props }: ToastViewportProps): React.ReactElement;
export declare namespace ToastViewport {
    var displayName: string;
}
/** The builtin (zero-dependency) Toast engine, as `ToastParts`. */
export declare const builtinToast: ToastParts;
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