@Test void toStringContainsOnlySummaryInformation() throws IOException {
    try (PulsarCollector collector = builder().build()) {
      assertThat(collector).hasToString(String.format(
          "PulsarCollector{clientProps={serviceUrl=%s}, consumerProps={subscriptionName=%s}, topic=%s}",
          pulsar.serviceUrl(),
          testName,
          testName
      ));
    }
  }
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-collector/pulsar/src/test/java/zipkin2/collector/pulsar/ITPulsarCollector.java