/**
 * HTML serializer — converts ContentUnit back to HTML strings (raw-only).
 *
 * Every indexed tag carries a `raw:<opening tag>` style. The serializer
 * routes the stored opening tag through the shared allowlist sanitizer and
 * derives the close tag from the embedded tag name. Void elements get no
 * close tag. Text segments are HTML-escaped (ContentUnit.text holds decoded
 * Unicode — see MarkupParser.decodeEntities), so serializer output is inert
 * even when the translation value is attacker-controlled. `ContentUnit.text`
 * itself is never modified — auto_key hashing is unaffected.
 *
 * @module content/serializer/HTMLSerializer
 */
import type { ISerializer } from './ISerializer.js';
import type { ContentUnit } from '../types.js';
/**
 * Serializer that converts ContentUnit format back to HTML strings.
 *
 * @example
 * ```typescript
 * const serializer = new HTMLSerializer();
 * serializer.serialize({
 *   text: 'Read our <1>Terms</1>.',
 *   styles: { '1': ['raw:<b>'] }
 * });
 * // → 'Read our <b>Terms</b>.'
 * ```
 */
export declare class HTMLSerializer implements ISerializer<string> {
    serialize(unit: ContentUnit): string;
}
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