import { SafePlugin } from '@atlaskit/editor-common/safe-plugin';
import { PluginKey } from '@atlaskit/editor-prosemirror/state';
export declare const mentionPlaceholderPluginKey: PluginKey;
export declare const MENTION_PLACEHOLDER_ACTIONS: {
    SHOW_PLACEHOLDER: string;
    HIDE_PLACEHOLDER: string;
};
export type MentionPlaceholderPluginState = {
    placeholder?: string;
};
export declare function createMentionPlaceholderPlugin(): SafePlugin<{}>;