// Expected - file no longer exists
        }
    }

    @Test
    public void testFileBasedCacheCloseNonExistentFile() {
        tempFile = new File(Curl.tmpDir, "non-existent-file.tmp");
        assertFalse(tempFile.exists());

        ContentCache cache = new ContentCache(tempFile);

        // Should throw IOException when file doesn't exist
        try {
            cache.close();

        // Verify status code
        Integer status = JsonPath.from(response).get("response.status");
        assertEquals(Integer.valueOf(0), status, "Status should be 0");

        // Verify version field exists
        String version = JsonPath.from(response).get("response.version");
        assertNotNull(version, "Version should not be null");

        logger.info("Stats version: {}", version);

</div>

This means that it will **always have a value**, it's just that sometimes the value could be `None` (or `null` in JSON).

That means that, clients using your API don't have to check if the value exists or not, they can **assume the field will always be there**, but just that in some cases it will have the default value of `None`.

                }
            }
        }
        return plugins.values();
    }

    private PluginInfo extractPluginInfo(Artifact artifact) {
        // sanity: jar, no classifier and file exists
        if (artifact != null
                && "jar".equals(artifact.getExtension())
                && "".equals(artifact.getClassifier())
                && artifact.getPath() != null) {

	// See https://docs.aws.amazon.com/AmazonS3/latest/API/API_PutBucketLifecycle.html
	// In the newer PutBucketLifecycleConfiguration API, Rule has a prefix field that is deprecated, and there exists an optional
	// Filter field, and within it, an optional Prefix field.
	// See https://docs.aws.amazon.com/AmazonS3/latest/API/API_PutBucketLifecycleConfiguration.html

	return r
}

// SetTags - sets key/val to ReqInfo.tags
func (r *ReqInfo) SetTags(key, val string) *ReqInfo {
	if r == nil {
		return nil
	}
	r.Lock()
	defer r.Unlock()
	// Search of tag key already exists in tags
	var updated bool
	for _, tag := range r.tags {
		if tag.Key == key {
			tag.Val = val
			updated = true
			break
		}
	}
	if !updated {
		// Append to the end of tags list

    int[] cellColumnIndices = new int[cellSet().size()];
    int i = 0;
    for (Cell<R, C, V> cell : cellSet()) {
      // requireNonNull is safe because the cell exists in the table.
      cellColumnIndices[i++] = requireNonNull(columnKeyToIndex.get(cell.getColumnKey()));
    }
    return SerializedForm.create(this, cellRowIndices, cellColumnIndices);
  }

	// 2. If bucket versioning is suspended and
	//    a. version id is specified, remove its remote object.
	//    b. version id is not specified, remove null version's remote object if it exists.
	// 3. If bucket versioning is enabled and
	//    a. version id is specified, remove its remote object.
	//    b. version id is not specified, nothing to be done (a delete marker is added).
	delTier := false
	switch {

    static final int FILE_SUPERSEDE = 0x0;

    /* Open the file or fail if it does not exist
     * aka OPEN_EXISTING
     */

    static final int FILE_OPEN = 0x1;

    /* Create the file or fail if it does not exist
     * aka CREATE_NEW
     */

    static final int FILE_CREATE = 0x2;

    /* Open the file or create it if it does not exist
     * aka OPEN_ALWAYS
     */

    static final int FILE_OPEN_IF = 0x3;

  }

  public void testTouch() throws IOException {
    File temp = createTempFile();
    assertTrue(temp.exists());
    assertTrue(temp.delete());
    assertFalse(temp.exists());
    Files.touch(temp);
    assertTrue(temp.exists());
    Files.touch(temp);
    assertTrue(temp.exists());

    assertThrows(
        IOException.class,
        () ->
            Files.touch(