`Optional[str]` の`Optional` はFastAPIでは使用されていません（FastAPIは`str`の部分のみ使用します）。しかし、`Optional[str]` はエディタがコードのエラーを見つけるのを助けてくれます。

///

## Pydanticを使わない方法

	maxRecordMessageLength = (128 << 10) - 256
)

var bufLength = payloadLenForMsgLen(maxRecordMessageLength)

// newRecordsMessage - creates new Records Message which can contain a single record, partial records,
// or multiple records. Depending on the size of the result, a response can contain one or more of these messages.
//
// Header specification
// Records messages contain three headers, as follows:

 * <pre>
 * new EqualsTester().addEqualityGroup(foo).testEquals();
 * </pre>
 *
 * <p>This tests {@code foo.equals(foo)}, {@code foo.equals(null)}, and a few other operations.
 *
 * <p>For more extensive testing, add multiple equality groups. Each group should contain objects
 * that are equal to each other but unequal to the objects in any other group. For example:
 *
 * <pre>
 * new EqualsTester()

 * could in principle cause problems for some users. Still, we expect that the benefits of the
 * nullness annotations in particular will outweigh the costs. (And it's worth noting that we have
 * released multiple ListenableFuture.class files that are not byte-for-byte compatible even from
 * the beginning, thanks to using different `-source -target` values for compiling our `-jre` and
 * `-android` "flavors.")
 *

 * evicted or manually invalidated. The common way to build instances is using {@link CacheBuilder}.
 *
 * <p>Implementations of this interface are expected to be thread-safe, and can be safely accessed
 * by multiple concurrent threads.
 *
 * @param <K> the type of the cache's keys, which are not permitted to be null
 * @param <V> the type of the cache's values, which are not permitted to be null
 * @author Charles Fry
 * @since 10.0

		// Default case of two ips one with higher octet moves
		// to the beginning of the list.
		{
			ipList:       []string{"127.0.0.1", "10.0.0.13"},
			sortedIPList: []string{"10.0.0.13", "127.0.0.1"},
		},
		// With multiple types of octet, chooses a higher octet.
		{
			ipList:       []string{"127.0.0.1", "172.0.21.1", "192.168.1.106"},
			sortedIPList: []string{"192.168.1.106", "172.0.21.1", "127.0.0.1"},
		},

	"Multi-Status":                    http.StatusMultiStatus,
	"Already Reported":                http.StatusAlreadyReported,
	"IM Used":                         http.StatusIMUsed,
	"Multiple Choices":                http.StatusMultipleChoices,
	"Moved Permanently":               http.StatusMovedPermanently,
	"Found":                           http.StatusFound,
	"See Other":                       http.StatusSeeOther,

    validations:
      required: true
  - type: dropdown
    id: os
    attributes:
      label: Operating System
      description: What operating system are you on?
      multiple: true
      options:
        - Linux
        - Windows
        - macOS
        - Other
    validations:
      required: true
  - type: textarea
    id: os-details
    attributes:

    validations:
      required: true

  - type: dropdown
    attributes:
      label: Packages
      description: Please select all of the packages that are relevant to this feature request.
      multiple: true
      options:
        - com.google.common.annotations
        - com.google.common.base
        - com.google.common.cache
        - com.google.common.collect
        - com.google.common.escape

        public int read(final char[] cbuf, final int off, final int len) {
            throw new IllegalStateException("TokenStream contract violation: reset()/close() call missing, "
                    + "reset() called multiple times, or subclass does not call super.reset(). "
                    + "Please see Javadocs of TokenStream class for more information about the correct consuming workflow.");
        }

        @Override