/**
 * Imports a `<dom-module id="name">` style module by its id and returns the
 * `<style>` content for the module. Ensure that the module is imported and
 * added to the DOM before calling `importStyleModule()`.
 *
 * @deprecated Use stylesFromModule from
 *   `@polymer/polymer/lib/utils/style-gather`
 * @param styleModule the named id of the style module to import
 * @returns the style module's CSS text, or an empty string if the module does
 *   not exist
 */
export declare function importStyleModule(styleModule: string): string;
/**
 * Resets the cache using by `importStyleModule()`, primarily used for testing.
 *
 * @deprecated clearStyleModuleCache will be removed in the next major release
 */
export declare function clearStyleModuleCache(): void;