export declare const defautSideEffects: (sideEffectFreeModules?: string[] | undefined) => string[];
export interface OptimizerOptions {
    sideEffectFreeModules?: string[];
    angularCoreModules?: string[];
}
export declare function optimizer(content: string, id: string, options: OptimizerOptions): Promise<{
    map: import("source-map").RawSourceMap | null;
    code: string;
} | null>;