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);

   * Support for {@link ListIterator#set(Object)}; ignored for plain {@link Iterator}
   * implementations.
   */
  SUPPORTS_SET;

  /**
   * A set containing none of the optional features of the {@link Iterator} or {@link ListIterator}
   * interfaces.
   */
  public static final Set<IteratorFeature> UNMODIFIABLE = emptySet();

  /**
   * A set containing all of the optional features of the {@link Iterator} and {@link ListIterator}

            list.add(entity);
        });

        list.setPageSize(size);
        list.setAllRecordCount((int) searchHits.getTotalHits().value());
        list.setCurrentPageNumber(cb.getFetchPageNumber());

        list.setTook(response.getTook().getMillis());
        list.setTotalShards(response.getTotalShards());
        list.setSuccessfulShards(response.getSuccessfulShards());

        final List<Map<String, Object>> itemList = JsonPath.from(response).getList(getResponsePath(namePrefix));
        assertEquals(1, itemList.size());
        return itemList.get(0);
    }

    protected static List<String> getSchedulerIds(final String namePrefix) {
        final String response = getJsonResponse("/api/admin/scheduler/settings");

                    List<String> list = paramListMap.get(key);
                    if (list == null) {
                        list = new ArrayList<>();
                        paramListMap.put(key, list);
                    }
                    list.add(StringUtil.EMPTY);
                }
            }
        } catch (final DecoderException e) {
            throw new IOException(e);
        }

## 🔗 ⏮️ 📕

👆 💪 🔗 ⏮️ <a href="https://tiangolo.com" class="external-link" target="_blank">👤 (🇹🇦 🇩🇬 / `tiangolo`)</a>, 📕.

👆 💪:

* <a href="https://github.com/tiangolo" class="external-link" target="_blank">⏩ 👤 🔛 **📂**</a>.
    * 👀 🎏 📂 ℹ 🏗 👤 ✔️ ✍ 👈 💪 ℹ 👆.
    * ⏩ 👤 👀 🕐❔ 👤 ✍ 🆕 📂 ℹ 🏗.

    }

    /**
     * Test contains method with null list
     */
    @Test
    @DisplayName("Contains should return false for null list")
    void testContainsNullList() {
        assertFalse(AvPairs.contains(null, AvPair.MsvAvFlags), "Should return false for null list");
    }

    /**
     * Test contains method with empty list
     */
    @Test

     * @param analyzer Analyzer
     * @param field Field
     * @param text Text
     * @param lang Language
     * @return List of tokens
     */
    protected List<AnalyzeToken> analyzeText(final SuggestAnalyzer analyzer, final String field, final String text, final String lang) {
        final List<AnalyzeToken> tokens = new ArrayList<>();
        final StringBuilder buf = new StringBuilder(maxAnalyzedContentLength);

	}
	data = data[len(line):]
	line, isPrefix, err = l.ReadLine()
	if isPrefix || !bytes.Equal(line, data[:minReadBufferSize/2]) || err != nil {
		t.Errorf("bad result for third line: got %q want %q %v", line, data[:minReadBufferSize/2], err)
	}
	line, isPrefix, err = l.ReadLine()
	if isPrefix || err == nil {
		t.Errorf("expected no more lines: %x %s", line, err)
	}
}

```JSON
{
  "detail": "Item not found"
}
```

/// tip

When raising an `HTTPException`, you can pass any value that can be converted to JSON as the parameter `detail`, not only `str`.

You could pass a `dict`, a `list`, etc.

They are handled automatically by **FastAPI** and converted to JSON.

///

## Add custom headers { #add-custom-headers }