import ComponentHook from '../../component_hook.js';
import type ComponentContext from '../../component_context.js';
export declare class SupportStyles extends ComponentHook {
    /**
     * Reset all cached/per-request state. Called by the provider between
     * requests (or from tests).
     */
    static flushState(): void;
    /**
     * Drop the dedup set for a single finished request. Called by the
     * provider once a request's response has been built, so the map doesn't
     * grow unbounded across the app's lifetime (PHP parity concern only
     * `flushState()` — testing/reset — cannot cover on its own). Does NOT
     * touch `styleBlocksByComponentName` — that cache is meant to survive
     * requests.
     */
    static clearRequest(reqId: string | undefined): void;
    dehydrate(context: ComponentContext): Promise<void>;
}