*     .url("http://publicobject.com/helloworld.txt")
 *     .build();
 * Response forceCacheResponse = client.newCall(request).execute();
 * if (forceCacheResponse.code() != 504) {
 *   // The resource was cached! Show it.
 * } else {
 *   // The resource was not cached.
 * }
 * ```
 *
 * This technique works even better in situations where a stale response is better than no response.

            // Given
            SmbResource resource = createMockResource();
            when(resource.exists()).thenReturn(true);
            when(resource.isFile()).thenReturn(true);
            when(resource.canWrite()).thenReturn(true);

            // When/Then
            assertTrue(resource.exists(), "Resource should exist");
            assertTrue(resource.isFile(), "Should be a file");

    private ArtifactTransferResource wrap(Repository repository, Resource resource) {
        if (resource == null) {
            return null;
        } else {
            synchronized (artifacts) {
                ArtifactTransferResource artifact = artifacts.get(resource);

                if (artifact == null) {
                    artifact = new MavenArtifact(repository.getUrl(), resource);
                    artifacts.put(resource, artifact);

        } catch (final MissingResourceException ignore) {
            return null;
        }
    }

    /**
     * Returns the string for the specified key from the resource bundle.
     *
     * @param bundle the resource bundle (must not be {@literal null} or empty)
     * @param key the key
     * @return the string for the specified key (must not be {@literal null} or empty)

		locksHeld[resource] = []lockRequesterInfo{lri}
	}

	// Add a few concurrent read locks to the mix
	for i := range 50 {
		resource := fmt.Sprintf("bucket/get-object-%d", i)
		lri := lockRequesterInfo{
			Name:   resource,
			UID:    mustGetUUID(),
			Owner:  owners[i%len(owners)],
			Quorum: 2,
		}
		lris = append(lris, lri)
		locksHeld[resource] = append(locksHeld[resource], lri)

    checkArgument(url != null, "resource %s not found.", resourceName);
    return url;
  }

  /**
   * Given a {@code resourceName} that is relative to {@code contextClass}, returns a {@code URL}
   * pointing to the named resource.
   *
   * @throws IllegalArgumentException if the resource is not found
   */
  @CanIgnoreReturnValue // being used to check if a resource exists

    public void setSource(String source) {
        getDelegate().setSource(source);
    }

    public String getSource() {
        return getDelegate().getSource();
    }

    /**
     * @see java.lang.Object#toString()
     */
    public String toString() {
        return "Profile {id: " + getId() + ", source: " + getSource() + "}";
    }
            ]]>

            locations.putAll(sourceDominant ? sourceLocations : targetLocations);
        }

        return new InputLocation(-1, -1, InputSource.merge(source.getSource(), target.getSource()), locations);
    } // -- InputLocation merge( InputLocation, InputLocation, boolean )

    /**
     * Merges the {@code source} location into the {@code target} location.

     */
    @Throws(IOException::class)
    fun edit(): Editor? = ******@****.***(key, sequenceNumber)

    /** Returns the unbuffered stream with the value for [index]. */
    fun getSource(index: Int): Source = sources[index]

    /** Returns the byte length of the value for [index]. */
    fun getLength(index: Int): Long = lengths[index]

    override fun close() {
      for (source in sources) {

	}

	defer l.getMutex()()

	for _, resource := range args.Resources {
		lri, ok := l.lockMap[resource]
		if ok && !isWriteLock(lri) {
			// Unless it is a write lock reject it.
			err = fmt.Errorf("unlock attempted on a read locked entity: %s", resource)
			continue
		}
		if ok {
			reply = l.removeEntry(resource, args, &lri) || reply
		}
	}
	return
}