/**
 * Cadence-option types and validation shared by WS listeners and the
 * subscription manager. Two knobs:
 *   - `throttleMs` — own trailing-edge timer at this interval.
 *   - `scheduler` — cross-stream coordinator; needs `throttleMs` for the
 *     group cadence.
 */
import type { UpdateScheduler } from './wsUpdateScheduler';
export interface WsCadenceOptions {
    throttleMs?: number;
    /** Requires `throttleMs` to also be set. */
    scheduler?: UpdateScheduler;
}
/** Throws synchronously at the entrypoint so partial subscription state never lands. */
export declare function validateThrottleMs(throttleMs: number | undefined, callSiteName: string): void;
export declare function assertCadenceOptions(callSiteName: string, scheduler: UpdateScheduler | undefined, throttleMs: number | undefined): void;
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