import { OptimizerPlugin } from './OptimizerPlugin';
/**
 * Dynamically load the optimizer plugins and return them in the order they should be executed.
 * If there is a circular dependency in the plugins, an error will be logged and the resulting order is undetermined.
 * @param folder - the folder to load optimizers from.  Currently only used in tests.  CLI uses default value.
 */
export declare function loadOptimizers(folder?: string): Promise<OptimizerPlugin[]>;