/**
 * @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
 */
import type { ToolbarConfigItem } from '@ckeditor/ckeditor5-core';
import type { MediaStyleConfig, MediaStyleDropdownDefinition, NormalizedMediaStyleOption } from '../mediaembedconfig.js';
/**
 * Normalizes the {@link module:media-embed/mediaembedconfig~MediaStyleConfig#options style options}
 * provided by the integrator. Each entry is resolved into a full
 * {@link module:media-embed/mediaembedconfig~MediaStyleOptionDefinition} and invalid entries
 * are filtered out with a console warning.
 *
 * @internal
 */
export declare function normalizeStyles(configuredStyles: MediaStyleConfig): Array<NormalizedMediaStyleOption>;
/**
 * Type guard for toolbar config entries shaped like a media style dropdown definition. The
 * discriminator is `defaultItem` — generic toolbar groupings use `items` + `label` and never
 * carry a `defaultItem` field.
 *
 * @internal
 */
export declare function isMediaStyleDropdown(item: ToolbarConfigItem | MediaStyleDropdownDefinition): item is MediaStyleDropdownDefinition;