import type { Observable, OperatorFunction } from "rxjs";
import type { Visibility } from "../Tooltip.js";
import type { VisibilityStatus } from "../UseHierarchyVisibility.js";
/** @internal */
export declare function setDifference<T>(lhs: Readonly<Iterable<T>>, rhs: ReadonlySet<T>): Set<T>;
/** @internal */
export declare function setIntersection<T>(lhs: Readonly<Iterable<T>>, rhs: ReadonlySet<T>): Set<T>;
/** @internal */
export declare function mergeVisibilities(obs: Observable<Visibility>): Observable<Visibility | "empty">;
/** @internal */
export declare function mergeVisibilityStatuses(tooltipMap?: {
    [key in Visibility]: string | undefined;
}, ignoreTooltip?: boolean): OperatorFunction<VisibilityStatus, VisibilityStatus>;
/** @internal */
export declare function getTooltipOptions(key: string | undefined, ignoreTooltip?: boolean): {
    useTooltip: string | false | undefined;
};
/** @internal */
export declare function releaseMainThreadOnItemsCount<T>(elementCount: number): (obs: Observable<T>) => Observable<T>;
/** @internal */
export declare function getOptimalBatchSize({ totalSize, maximumBatchSize }: {
    totalSize: number;
    maximumBatchSize: number;
}): number;
//# sourceMappingURL=Utils.d.ts.map