@Override
  protected void before() throws Throwable {
    classRuleSupplier.clearSpans();
  }
Used alongside {@link OpenTelemetryClassRule}. See that class's javadoc for details on when to
use these classes instead of {@link io.opentelemetry.sdk.testing.junit4.OpenTelemetryRule} and an
example of how to use these classes together.
hbase-server/src/test/java/org/apache/hadoop/hbase/trace/OpenTelemetryTestRule.java