import { Filter } from '@empathyco/x-types';
import { BaseFilterEntityModifier } from './types';
/**
 * A dictionary with information about whether to keep or remove sticky filters.
 */
interface Metadata {
    keepSticky: boolean;
}
/**
 * Allows to persist a filter between different queries.
 *
 * @remarks when using this modifier along with others, make sure this is the first one defined.
 *
 * @internal
 */
export declare class StickyModifier extends BaseFilterEntityModifier<Metadata> {
    /**
     * Deselects the passed filter unless the metadata has the `keepSticky` flag enabled.
     *
     * @param filter - The filter to deselect.
     * @param metadata - Additional information to prevent a filter from being deselected.
     */
    deselect(filter: Filter, metadata?: Metadata): void;
    /**
     * Selects the passed filter and stores it as sticky.
     *
     * @param filter - The filter to select.
     */
    select(filter: Filter): void;
}
export {};
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