export declare class StylesheetSerializer {
    static serialize(doc: Document, listener: SerializedStylesheetListener): void;
    static serializeStylesheets(styleSheets: StyleSheetList | ReadonlyArray<CSSStyleSheet>, listener: SerializedStylesheetListener): void;
    private static toSerializedStylesheet;
}
export declare type SerializedStylesheetListener = (stylesheet: SerializedStylesheet) => void;
export interface SerializedStylesheetRef {
    readonly imports: ReadonlyArray<CSSStyleSheet>;
    readonly stylesheet: SerializedStylesheet;
}
export interface SerializedStylesheet {
    readonly disabled: boolean;
    readonly href?: string;
    readonly text: string;
    readonly title?: string;
    readonly type: string;
}