code: private void exportCleanUp(PrintWriter out, int batchSize) {
          if (artificialUniques > 0) {
              while (artificialUniques > 0) {
                  String cypher = this.cypherFormat.statementForCleanUp(batchSize);
                  begin(out);
                  if (cypher != null && !"".equals(cypher)) {
                      out.println(cypher);
                  }
                  commit(out);
                  artificialUniques -= batchSize;
              }
              begin(out);
              String cypher = this.cypherFormat.statementForConstraint(UNIQUE_ID_LABEL, Collections.singleton(UNIQUE_ID_PROP)).replaceAll("^CREATE", "DROP");
              if (cypher != null && !"".equals(cypher)) {
                  out.println(cypher);
              }
              commit(out);
          }
          out.flush();
      }
docs: ---- CleanUp ----