import type { EffectAction } from "../runtime/types";
/**
 * Groups actions by their schedulerHints.parallelGroupId.
 * Actions without a parallelGroupId are placed under '__ungrouped__'.
 */
export declare function groupActionsByParallelGroup(actions: EffectAction[]): Map<string, EffectAction[]>;
export interface EffectiveConcurrencyOptions {
    maxConcurrency?: number;
}
/**
 * Returns the effective concurrency for a set of actions.
 * Takes the minimum of:
 *   - The explicit maxConcurrency option (if provided)
 *   - The minimum pendingCount from any action's schedulerHints (if any have it)
 *   - The number of actions (default upper bound)
 * Returns at least 0 for empty arrays, at least 1 otherwise.
 */
export declare function getEffectiveConcurrency(actions: EffectAction[], options?: EffectiveConcurrencyOptions): number;
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