/**
 * @license Copyright (c) 2003-2026, CKSource Holding sp. z o.o. All rights reserved.
 * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-licensing-options
 */
/**
 * @module engine/view/containerelement
 */
import { ViewElement, type ViewElementAttributes } from './element.js';
import { type ViewDocument } from './document.js';
import { type ViewNode } from './node.js';
/**
 * Containers are elements which define document structure. They define boundaries for
 * {@link module:engine/view/attributeelement~ViewAttributeElement attributes}.
 * They are mostly used for block elements like `<p>` or `<div>`.
 *
 * Editing engine does not define a fixed HTML DTD. This is why a feature developer needs to choose between various
 * types (container element, {@link module:engine/view/attributeelement~ViewAttributeElement attribute element},
 * {@link module:engine/view/emptyelement~ViewEmptyElement empty element}, etc) when developing a feature.
 *
 * The container element should be your default choice when writing a converter, unless:
 *
 * * this element represents a model text attribute (then use {@link module:engine/view/attributeelement~ViewAttributeElement}),
 * * this is an empty element like `<img>` (then use {@link module:engine/view/emptyelement~ViewEmptyElement}),
 * * this is a root element,
 * * this is a nested editable element (then use  {@link module:engine/view/editableelement~ViewEditableElement}).
 *
 * To create a new container element instance use the
 * {@link module:engine/view/downcastwriter~ViewDowncastWriter#createContainerElement `ViewDowncastWriter#createContainerElement()`}
 * method.
 */
export declare class ViewContainerElement extends ViewElement {
    /**
     * Creates a container element.
     *
     * @see module:engine/view/downcastwriter~ViewDowncastWriter#createContainerElement
     * @see module:engine/view/element~ViewElement
     * @internal
     * @param document The document instance to which this element belongs.
     * @param name Node name.
     * @param attrs Collection of attributes.
     * @param children A list of nodes to be inserted into created element.
     */
    constructor(document: ViewDocument, name: string, attrs?: ViewElementAttributes, children?: ViewNode | Iterable<ViewNode>);
    /**
     * Converts `ViewContainerElement` instance to plain object and returns it.
     *
     * @returns `ViewContainerElement` instance converted to plain object.
     */
    toJSON(): unknown;
}
/**
 * Returns block {@link module:engine/view/filler filler} offset or `null` if block filler is not needed.
 *
 * @returns Block filler offset or `null` if block filler is not needed.
 */
export declare function getViewFillerOffset(this: ViewContainerElement): number | null;