* algorithms should document their behavior in the presence of duplicates.
   *
   * <p>The elements of the returned {@code Iterable} must each be:
   *
   * <ul>
   *   <li>Non-null
   *   <li>Usable as {@code Map} keys (see the Guava User Guide's section on <a
   *       href="https://github.com/google/guava/wiki/GraphsExplained#graph-elements-nodes-and-edges">
   *       graph elements</a> for details)
   * </ul>
   *

    }

    assertEquals(values.size(), multimap().get(key).size());

    assertEquals(values.size() > 0, multimap().containsKey(key));
    assertEquals(values.size() > 0, multimap().keySet().contains(key));
    assertEquals(values.size() > 0, multimap().keys().contains(key));
  }

  protected final K k0() {
    return e0().getKey();
  }

  protected final V v0() {

   * algorithms should document their behavior in the presence of duplicates.
   *
   * <p>The elements of the returned {@code Iterable} must each be:
   *
   * <ul>
   *   <li>Non-null
   *   <li>Usable as {@code Map} keys (see the Guava User Guide's section on <a
   *       href="https://github.com/google/guava/wiki/GraphsExplained#graph-elements-nodes-and-edges">
   *       graph elements</a> for details)
   * </ul>
   *

@Beta
@ElementTypesAreNonnullByDefault
public interface MutableNetwork<N, E> extends Network<N, E> {

  /**
   * Adds {@code node} if it is not already present.
   *
   * <p><b>Nodes must be unique</b>, just as {@code Map} keys must be. They must also be non-null.
   *
   * @return {@code true} if the network was modified as a result of this call
   */
  @CanIgnoreReturnValue
  boolean addNode(N node);

  /**

var (
	DefaultKVS = config.KVS{
		config.KV{
			Key:   Endpoints,
			Value: "",
		},
		config.KV{
			Key:   PathPrefix,
			Value: "",
		},
		config.KV{
			Key:   CoreDNSPath,
			Value: "/skydns",
		},
		config.KV{
			Key:   ClientCert,
			Value: "",
		},
		config.KV{
			Key:   ClientCertKey,
			Value: "",
		},
	}
)

// Config - server etcd config.

  public void testPutAllNullValueSingle_unsupported() {
    multimap().putAll(k1(), Lists.newArrayList((V) null));
    expectUnchanged();
  }

  // In principle, it would be nice to apply these two tests to keys with existing values, too.

  @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_VALUES)
  public void testPutAllNullValueNullLast_unsupported() {
    int size = getNumElements();

    assertThrows(

func StartTestTLSServer(t TestErrHandler, instanceType string, cert, key []byte) TestServer {
	// Fetch TLS key and pem files from test-data/ directory.
	//	dir, _ := os.Getwd()
	//	testDataDir := filepath.Join(filepath.Dir(dir), "test-data")
	//
	//	pemFile := filepath.Join(testDataDir, "server.pem")
	//	keyFile := filepath.Join(testDataDir, "server.key")
	cer, err := tls.X509KeyPair(cert, key)
	if err != nil {

    if (oldEntryForValue != null
        && keyHash == oldEntryForValue.keyHash
        && Objects.equal(key, oldEntryForValue.key)) {
      return key;
    } else if (oldEntryForKey != null && !force) {
      throw new IllegalArgumentException("key already present: " + key);
    }

    /*
     * The ordering here is important: if we deleted the key entry and then the value entry,

#### List all config keys available

```
~ mc admin config set myminio/
```

#### Obtain help for each key

```
~ mc admin config set myminio/ <key>
```

e.g: `mc admin config set myminio/ etcd` returns available `etcd` config args

```
~ mc admin config set play/ etcd
KEY:
etcd  federate multiple clusters for IAM and Bucket DNS

ARGS:

	// preceding the original header. This file contains a set of key-value
	// records, which are used to overcome USTAR's shortcomings, in addition to
	// providing the ability to have sub-second resolution for timestamps.
	//
	// Some newer formats add their own extensions to PAX by defining their
	// own keys and assigning certain semantic meaning to the associated values.