@Test void toStringContainsOnlySummaryInformation() {
    assertThat(new ThrottledStorageComponent(delegate, registry, tracing, 1, 2, 1))
      .hasToString("Throttled{InMemoryStorage{}}");
  }
The {@code toString()} of {@link Component} implementations appear in health check endpoints.
Since these are likely to be exposed in logs and other monitoring tools, care should be taken
to ensure {@code toString()} output is a reasonable length and does not contain sensitive
information.
zipkin-server/src/test/java/zipkin2/server/internal/throttle/ThrottledStorageComponentTest.java