## List fields { #list-fields }

You can define an attribute to be a subtype. For example, a Python `list`:

{* ../../docs_src/body_nested_models/tutorial001_py310.py hl[12] *}

This will make `tags` be a list, although it doesn't declare the type of the elements of the list.

## List fields with type parameter { #list-fields-with-type-parameter }

        list.clear();
        authenticator.addGroupOrRoleName(list, "test", false);
        assertEquals(1, list.size());
        assertEquals("test", list.get(0));

        list.clear();
        authenticator.addGroupOrRoleName(list, "******@****.***", true);
        assertEquals(2, list.size());
        assertEquals("******@****.***", list.get(0));
        assertEquals("test", list.get(1));

    @Override
    protected List<String> create(String[] elements) {
      return ImmutableList.<String>builder().addAll(asList(elements)).build();
    }
  }

  public static class BuilderReversedListGenerator extends TestStringListGenerator {
    @Override
    protected List<String> create(String[] elements) {
      List<String> list = asList(elements);
      Collections.reverse(list);

    }

    public int[] batchInsert(List<FileAuthentication> list) {
        return batchInsert(list, null, null);
    }

    public int[] batchInsert(List<FileAuthentication> list, RequestOptionCall<BulkRequestBuilder> call) {
        return batchInsert(list, call, null);
    }

    public int[] batchInsert(List<FileAuthentication> list, RequestOptionCall<BulkRequestBuilder> call,

        return doBatchInsert(new BulkList<>(list, call, entityCall), null);
    }

    public int[] batchUpdate(List<SearchLog> list) {
        return batchUpdate(list, null, null);
    }

    public int[] batchUpdate(List<SearchLog> list, RequestOptionCall<BulkRequestBuilder> call) {
        return batchUpdate(list, call, null);
    }

    public int[] batchUpdate(List<SearchLog> list, RequestOptionCall<BulkRequestBuilder> call,

        return doBatchInsert(new BulkList<>(list, call, entityCall), null);
    }

    public int[] batchUpdate(List<FileConfig> list) {
        return batchUpdate(list, null, null);
    }

    public int[] batchUpdate(List<FileConfig> list, RequestOptionCall<BulkRequestBuilder> call) {
        return batchUpdate(list, call, null);
    }

    public int[] batchUpdate(List<FileConfig> list, RequestOptionCall<BulkRequestBuilder> call,

      List<String> list = Lists.newArrayList(elements);
      list.add("zzz");
      return ImmutableSortedSet.copyOf(list).headSet("zzy");
    }
  }

  public static class ImmutableSortedSetTailsetGenerator extends TestStringSortedSetGenerator {
    @Override
    protected SortedSet<String> create(String[] elements) {
      List<String> list = Lists.newArrayList(elements);

        return doBatchInsert(new BulkList<>(list, call, entityCall), null);
    }

    public int[] batchUpdate(List<ClickLog> list) {
        return batchUpdate(list, null, null);
    }

    public int[] batchUpdate(List<ClickLog> list, RequestOptionCall<BulkRequestBuilder> call) {
        return batchUpdate(list, call, null);
    }

    public int[] batchUpdate(List<ClickLog> list, RequestOptionCall<BulkRequestBuilder> call,

        return doBatchInsert(new BulkList<>(list, call, entityCall), null);
    }

    public int[] batchUpdate(List<Role> list) {
        return batchUpdate(list, null, null);
    }

    public int[] batchUpdate(List<Role> list, RequestOptionCall<BulkRequestBuilder> call) {
        return batchUpdate(list, call, null);
    }

    public int[] batchUpdate(List<Role> list, RequestOptionCall<BulkRequestBuilder> call,

        return doBatchInsert(new BulkList<>(list, call, entityCall), null);
    }

    public int[] batchUpdate(List<FailureUrl> list) {
        return batchUpdate(list, null, null);
    }

    public int[] batchUpdate(List<FailureUrl> list, RequestOptionCall<BulkRequestBuilder> call) {
        return batchUpdate(list, call, null);
    }

    public int[] batchUpdate(List<FailureUrl> list, RequestOptionCall<BulkRequestBuilder> call,