import type { CustomEmoji } from '@mattermost/types/emojis';
import type { IDMappedObjects } from '@mattermost/types/utilities';
import type { MMReduxAction } from 'mattermost-redux/action_types';
export declare function customEmoji(state: IDMappedObjects<CustomEmoji> | undefined, action: MMReduxAction): IDMappedObjects<CustomEmoji>;
declare const _default: import("redux").Reducer<{
    customEmoji: IDMappedObjects<CustomEmoji>;
    nonExistentEmoji: Set<string>;
}, import("redux").AnyAction, Partial<{
    customEmoji: IDMappedObjects<CustomEmoji> | undefined;
    nonExistentEmoji: Set<string> | undefined;
}>>;
export default _default;