@SuppressWarnings("unchecked")
        BiConsumer<Integer, Integer> consumer = mock(BiConsumer.class);

        // Act: for each input, if a mapping exists, notify the consumer
        for (int dos : inputs) {
            int nt = findNtStatusOrMinusOne(dos);
            if (nt != -1) {
                consumer.accept(dos, nt);
            }
        }

        // 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`.

    /**
     * Stores a file configuration in the database.
     * This method encrypts the configuration parameters before saving and
     * performs an insert or update operation based on whether the configuration exists.
     *
     * @param fileConfig the file configuration to be stored
     */
    public void store(final FileConfig fileConfig) {

		return b
	}

	// New bucket. If we fail return the transient bucket.
	b = newBucketMetacache(bucket, true)
	m.buckets[bucket] = b
	return b
}

// deleteBucketCache will delete the bucket cache if it exists.
func (m *metacacheManager) deleteBucketCache(bucket string) {
	m.init.Do(m.initManager)
	m.mu.Lock()
	b, ok := m.buckets[bucket]
	if !ok {
		m.mu.Unlock()
		return
	}
	delete(m.buckets, bucket)

                }
            }
        }
        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) {

	if s3Error := checkRequestAuthType(ctx, r, policy.GetBucketVersioningAction, bucket, ""); s3Error != ErrNone {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(s3Error), r.URL)
		return
	}

	// Check if bucket exists.
	if _, err := objectAPI.GetBucketInfo(ctx, bucket, BucketOptions{}); err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

	config, err := globalBucketVersioningSys.Get(bucket)

	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

    }

    /**
     * Stores (inserts or updates) a duplicate host configuration.
     *
     * <p>This method immediately refreshes the index to ensure the change is visible.
     * If the configuration already exists (based on ID), it will be updated;
     * otherwise, a new configuration will be created.</p>
     *
     * @param duplicateHost the duplicate host configuration to store

    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);
  }