import type { SlateEditor } from '@udecode/plate-common';
import type { Location, Span } from 'slate';
import type { ListsSchema } from '../types';
/**
 * Decreases nesting depth of all "list-items" in the current selection.
 * All "list-items" in the root "list" will become "default" nodes.
 *
 * @returns {boolean} True, if the editor state has been changed.
 */
export declare function decreaseDepth(editor: SlateEditor, schema: ListsSchema, at?: Location | Span | null): boolean;