// should not show anything with column-family = 'a'
String tableName3 = namespace + ".table3";
c.tableOperations().create(tableName3);
IteratorSetting setting = new IteratorSetting(250, "thing", SimpleFilter.class.getName());
c.namespaceOperations().attachIterator(namespace, setting);
BatchWriter bw = c.createBatchWriter(tableName3, new BatchWriterConfig());
Mutation m = new Mutation("r");
m.put("a", "b", new Value("abcde".getBytes()));
bw.addMutation(m);