re-add export

Author: mydea

packages/core/src/metrics/exports-default.ts

@@ -1,4 +1,4 @@
-import type { MetricData, Metrics } from '@sentry/types';
+import type { Client, MetricData, Metrics, MetricsAggregator as MetricsAggregatorInterface } from '@sentry/types';
 import { MetricsAggregator } from './aggregator';
 import { metrics as metricsCore } from './exports';
 
@@ -38,9 +38,23 @@ function gauge(name: string, value: number, data?: MetricData): void {
   metricsCore.gauge(MetricsAggregator, name, value, data);
 }
 
-export const metricsDefault: Metrics = {
+/**
+ * Returns the metrics aggregator for a given client.
+ */
+function getMetricsAggregatorForClient(client: Client): MetricsAggregatorInterface {
+  return metricsCore.getMetricsAggregatorForClient(client, MetricsAggregator);
+}
+
+export const metricsDefault: Metrics & {
+  getMetricsAggregatorForClient: typeof getMetricsAggregatorForClient;
+} = {
   increment,
   distribution,
   set,
   gauge,
+
+  /**
+   * @ignore This is for internal use only.
+   */
+  getMetricsAggregatorForClient,
 };