@Override public void clear() {
      // Intentionally don't clean up as each method runs in an isolated keyspace. This prevents
      // adding more load to the shared Cassandra instance used for all tests.
    }
The current implementation does not include dependency aggregation. It includes retrieval of
pre-aggregated links, usually made via zipkin-dependencies
zipkin-storage/cassandra/src/test/java/zipkin2/storage/cassandra/ITCassandraStorageHeavy.java