this.key = key;
      this.hash = hash;
      this.next = next;
    }

    @Override
    public K getKey() {
      return this.key;
    }

    // The code below is exactly the same for each entry type.

    final int hash;
    @CheckForNull final ReferenceEntry<K, V> next;
    volatile ValueReference<K, V> valueReference = unset();

    @Override

ASCII text.  There are four ways to represent the integer value
as a numeric constant: <code>\x</code> followed by exactly two hexadecimal
digits; <code>\u</code> followed by exactly four hexadecimal digits;
<code>\U</code> followed by exactly eight hexadecimal digits, and a
plain backslash <code>\</code> followed by exactly three octal digits.
In each case the value of the literal is the value represented by
the digits in the corresponding base.

  Alice had no idea what to do, and in despair she put her hand
in her pocket, and pulled out a box of comfits, (luckily the salt
water had not got into it), and handed them round as prizes.
There was exactly one a-piece all round.

  `But she must have a prize herself, you know,' said the Mouse.

  `Of course,' the Dodo replied very gravely.  `What else have
you got in your pocket?' he went on, turning to Alice.

 * characters in addition to the normal filename characters. The '*'
 * character matches any number of characters in part of a name. If
 * the expression begins with one or more '?'s then exactly that
 * many characters will be matched whereas if it ends with '?'s
 * it will match that many characters <i>or less</i>.
 * <p>
 * Wildcard expressions will not filter workgroup names or server names.
 *

                       "or_rules": {
                        "rules": [
                         {
                          "url_path": {
                           "path": {
                            "exact": "/data"
                           }
                          }
                         }
                        ]
                       }
                      }
                     ]

    assertThat(response.body.string()).isEqualTo("")
    server.takeRequest() // seed
    return server.takeRequest()
  }

  /**
   * For Last-Modified and Date headers, we should echo the date back in the exact format we were
   * served.
   */
  @Test
  fun retainServedDateFormat() {
    // Serve a response with a non-standard date format that OkHttp supports.

          <name>name</name>
          <version>4.0.0+</version>
          <type>String</type>
          <description>
            The name of the operating system to be used to activate the profile. This must be an exact match
            of the {@code ${os.name}} Java property, such as {@code Windows XP}.
          </description>
        </field>
        <field>
          <name>family</name>
          <version>4.0.0+</version>