export declare class AssetHostTransformer {
    private static readonly HTML_TAG_INDICATOR;
    private readonly assetBase;
    private readonly quotedAssetBasePattern;
    constructor(assetBase: string);
    private static escapeForRegex;
    private static normalizeAssetHost;
    static containsHtmlMarkup(payload: string): boolean;
    transform(html: string, assetHost: string): string;
    transformBuffer(body: Buffer, assetHost: string): Buffer<ArrayBufferLike>;
}