cassandra-unit/src/main/java/org/cassandraunit/utils/EmbeddedCassandraServerHelper.java
public static void cleanDataEmbeddedCassandra(String keyspace, String... excludedTables) {
            if (session != null) {
                cleanDataWithNativeDriver(keyspace, excludedTables);
            }
    }
public static void cleanDataEmbeddedCassandra(String keyspace, String... excludedTables) {
            if (session != null) {
                cleanDataWithNativeDriver(keyspace, excludedTables);
            }
    }
truncate data in keyspace, except specified tables