* without it because it is an immutable object in a volatile field. This is desirable so that
   * methods like {@link #state}, {@link #failureCause} and notably {@link #toString} can be run
   * without grabbing the lock.
   *
   * <p>To update this field correctly the lock must be held to guarantee that the state is
   * consistent.
   */

                    setMechanismListMIC(mechanismListMIC.getOctets());
                    break;
                default:
                    throw new IOException("Malformed token field.");
                }
            }
        }
    }

     */
    @Override
    public synchronized void sign ( byte[] data, int offset, int length, CommonServerMessageBlock request, CommonServerMessageBlock response ) {
        this.digest.reset();

        // zero out signature field
        int index = offset + SIGNATURE_OFFSET;
        for ( int i = 0; i < SIGNATURE_LENGTH; i++ )
            data[ index + i ] = 0;

        // set signed flag

                    throw new PACDecodingException("Decryption failed " + serverKey.getKeyType(), e);
                }
                break;
            default:
                throw new PACDecodingException("Unrecognized field " + tagged.getTagNo());
            }
        }

    }


    public String getUserPrincipalName () {
        return this.encData.getUserPrincipalName();
    }

  }

  private static final class AvlNode<E extends @Nullable Object> {
    /*
     * For "normal" nodes, the type of this field is `E`, not `@Nullable E` (though note that E is a
     * type that can include null, as in a TreeMultiset<@Nullable String>).
     *
     * For the header node, though, this field contains `null`, regardless of the type of the
     * multiset.
     *

in this list response. If the list request contained label or field selectors, then the number of remaining items is unknown and the field will be left unset and omitted during serialization. If the list is complete (either because it is not chunking or because this is the last chunk), then there are no more remaining items and this field will be left unset and omitted during serialization. Servers older than v1.15 do not set this field. The intended use of the remainingItemCount is *estimating* the...

    }

    public interface ContentTransformer {
        /**
         * Interpolate the value read from the xpp3 document
         * @param source The source value
         * @param fieldName A description of the field being interpolated. The implementation may use this to
         *                           log stuff.
         * @return The interpolated value.
         */
        String transform(String source, String fieldName);

Prefer to use the `Annotated` version if possible.

///

```Python hl_lines="9-12  16"
{!> ../../docs_src/cookie_param_models/tutorial001.py!}
```

////

**FastAPI** will **extract** the data for **each field** from the **cookies** received in the request and give you the Pydantic model you defined.

## Check the Docs

You can see the defined cookies in the docs UI at `/docs`:

<div class="screenshot">

// IsNull returns if both NoncurrentDays and NoncurrentVersions are empty
func (n NoncurrentVersionExpiration) IsNull() bool {
	return n.IsDaysNull() && n.NewerNoncurrentVersions == 0
}

// IsDaysNull returns true if days field is null
func (n NoncurrentVersionExpiration) IsDaysNull() bool {
	return n.NoncurrentDays == ExpirationDays(0)
}

// Validate returns an error with wrong value
func (n NoncurrentVersionExpiration) Validate() error {

  // as if the messageExpression field were unset. If messageExpression evaluates to an empty string, a string with only spaces, or a string
  // that contains line breaks, then the validation failure message will also be produced as if the messageExpression field were unset, and