That means that if you want to update the item `bar` using `PUT` with a body containing:

```Python
{
    "name": "Barz",
    "price": 3,
    "description": None,
}
```

because it doesn't include the already stored attribute `"tax": 20.2`, the input model would take the default value of `"tax": 10.5`.

And the data would be saved with that "new" `tax` of `10.5`.

/// danger

This is an "advanced" feature.

If you are just starting with **FastAPI** you might want to skip this section.

///

## Use cases { #use-cases }

Some use cases include:

* Converting non-JSON request bodies to JSON (e.g. <a href="https://msgpack.org/index.html" class="external-link" target="_blank">`msgpack`</a>).
* Decompressing gzip-compressed request bodies.

    delegate.awaitTerminated(timeout, unit);
  }

  /**
   * Returns the name of this service. {@link AbstractExecutionThreadService} may include the name
   * in debugging output.
   *
   * <p>Subclasses may override this method.
   *
   * @since 14.0 (present in 10.0 as getServiceName)
   */
  protected String serviceName() {

// Code generated by avx512test. DO NOT EDIT.

#include "../../../../../../runtime/textflag.h"

TEXT asmtest_vpclmulqdq_avx512f(SB), NOSPLIT, $0
	VPCLMULQDQ $127, X22, X21, X15                     // 6233550044fe7f or 6233d50044fe7f
	VPCLMULQDQ $127, X7, X21, X15                      // 6273550044ff7f or 6273d50044ff7f
	VPCLMULQDQ $127, X19, X21, X15                     // 6233550044fb7f or 6233d50044fb7f

    .build();
```

To serve this configuration the server needs to provide its clients with a chain of certificates
starting with its own and including everything up-to but not including the root. We don't need to
include root certificates because the client already has them.

```java
HandshakeCertificates serverHandshakeCertificates = new HandshakeCertificates.Builder()

            setupListCondition(cb, scheduledJobPager);
        });

        // update pager
        BeanUtil.copyBeanToBean(scheduledJobList, scheduledJobPager, option -> option.include(Constants.PAGER_CONVERSION_RULE));
        scheduledJobPager.setPageNumberList(scheduledJobList.pageRange(op -> {
            op.rangeSize(fessConfig.getPagingPageRangeSizeAsInteger());
        }).createPageNumberList());

            // update pager
            BeanUtil.copyBeanToBean(stemmerOvberrideList, stemmerOvberridePager, option -> option.include(Constants.PAGER_CONVERSION_RULE));
            stemmerOvberrideList.setPageRangeSize(fessConfig.getPagingPageRangeSizeAsInteger());
            stemmerOvberridePager.setPageNumberList(stemmerOvberrideList.createPageNumberList());

 * Do not confuse this class with the misnamed `HttpURLConnection`, which isn't so much a connection
 * as a single request/response exchange.
 *
 * ## Modern TLS
 *
 * There are trade-offs when selecting which options to include when negotiating a secure connection
 * to a remote host. Newer TLS options are quite useful:
 *
 *  * Server Name Indication (SNI) enables one IP address to negotiate secure connections for
 *    multiple domain names.
 *

  }

  /**
   * A word about using {@link Equivalence}, which automatically checks for {@code null} and
   * identical inputs: This sounds like it ought to be a problem here, since the goals of this class
   * include testing that {@code equals()} is reflexive and is tolerant of {@code null}. However,
   * there's no problem. The reason: {@link EqualsTester} tests {@code null} and identical inputs

## Introduction

Returns a set of temporary security credentials for applications/clients who have been authenticated through client credential grants provided by identity provider. Example providers include KeyCloak, Okta etc.