historyFile := pathJoin(minioConfigHistoryPrefix, uuidKV+kvPrefix)
	_, err := objAPI.DeleteObject(ctx, minioMetaBucket, historyFile, ObjectOptions{
		DeletePrefix:       true,
		DeletePrefixObject: true, // use prefix delete on exact object (this is an optimization to avoid fan-out calls)
	})
	return err
}

func readServerConfigHistory(ctx context.Context, objAPI ObjectLayer, uuidKV string) ([]byte, error) {

        settings.elevateWord().add(elevateWord2);
        settings.elevateWord().add(elevateWord3);
        assertEquals(3, settings.elevateWord().get().length);

        settings.elevateWord().delete(elevateWord2.getElevateWord());
        assertEquals(2, settings.elevateWord().get().length);
        assertEquals(elevateWord1.getElevateWord(), settings.elevateWord().get()[0].getElevateWord());

     *
     * @param fileName the name of the file to delete
     * @param jarPath the path to the JAR file
     * @throws PluginException if deletion fails
     */
    protected void uninstall(final String fileName, final Path jarPath) {
        try {
            Files.delete(jarPath);
        } catch (final IOException e) {
            throw new PluginException("Failed to delete the artifact " + fileName, e);
        }
    }

    if (!from.renameTo(to)) {
      copy(from, to);
      if (!from.delete()) {
        if (!to.delete()) {
          throw new IOException("Unable to delete " + to);
        }
        throw new IOException("Unable to delete " + from);
      }
    }
  }

  /**

        K key = entry.getKey();
        if (duplicates.containsKey(key)) {
          V value = duplicates.get(key);
          if (value == null) {
            continue; // delete this duplicate
          }
          entry = new ImmutableMapEntry<>(key, value);
          duplicates.put(key, null);
        }
        newEntryArray[outI++] = entry;
      }
      entryArray = newEntryArray;

這裡的「操作」指的是 HTTP 的「方法」之一。

其中包括：

* `POST`
* `GET`
* `PUT`
* `DELETE`

……以及更少見的：

* `OPTIONS`
* `HEAD`
* `PATCH`
* `TRACE`

在 HTTP 協定中，你可以使用這些「方法」之一（或更多）與每個路徑進行通信。

---

在建置 API 時，你通常使用這些特定的 HTTP 方法來執行特定的動作。

通常你使用：

* `POST`：用來建立資料。
* `GET`：用來讀取資料。
* `PUT`：用來更新資料。
* `DELETE`：用來刪除資料。

所以，在 OpenAPI 中，每個 HTTP 方法都被稱為「操作」。

我們將會稱它們為「**操作**」。

	var err error
	if _, err = objAPI.GetBucketInfo(ctx, bucket, BucketOptions{}); err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

	// Delete bucket encryption config from object layer
	updatedAt, err := globalBucketMetadataSys.Delete(ctx, bucket, bucketSSEConfig)
	if err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

	// Call site replication hook.

        client.prepareIndex().setIndex(TEST_INDEX).setId("2").setSource("field", "value2").execute().actionGet();
        client.admin().indices().prepareRefresh(TEST_INDEX).execute().actionGet();

        // Delete by query
        boolean result = SuggestUtil.deleteByQuery(client, settings, TEST_INDEX, QueryBuilders.termQuery("field", "value1"));
        assertTrue(result);

        // Verify deletion

	}
	keys = store.List()

	if len(keys) != 10 {
		t.Fatalf("List() Expected: 10, got %d", len(keys))
	}
	if len(keys) != store.Len() {
		t.Fatalf("List() Expected: 10, got %d", len(keys))
	}

	// Delete all
	for _, key := range keys {
		err := store.Del(key)
		if err != nil {
			t.Fatal(err)
		}
	}
	// Re-list
	keys = store.List()
	if len(keys) > 0 || err != nil {

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