/** The symbol used for identifying the outside angular metadata of a wrapper object. See [@OutsideAngular](/docs/miscellaneous/functions.html#OutsideAngular) decorator. */
export declare const OutsideAngularSymbol: unique symbol;
/**
 * Wraps the method with a call to `api.runOutsideAngular()`.
 * Methods decorated with this are expected to have access to a `GoogleMapsApiService` instance via `this.api`.
 *
 * This should be used inside classes marked with `@NativeObjectWrapper`.
 * In general, methods that change the map, its configuration, or cause it to redraw, should be marked with `@OutsideAngular`.
 * This will prevent unnecessary change detection runs as native Google Maps code is not associated with Angular.
 */
export declare function OutsideAngular(target: Object, methodName: string, descriptor: PropertyDescriptor): void;