| ----------|-------------|----------------------------------------
| xlHeader  | [4]byte     | `'X', 'L', '2', ' '`
| xlVersion | [4]byte     | `'1', ' ', ' ', ' '`
| xlMetaV2  | msgp object | All versions as single messagepack object
| [EOF] | |

### v1.1+

Version 1.1 added inline data, which will be placed after the metadata.

Therefore, the metadata is wrapped as a binary array for easy skipping.

 * limitations under the License.
 */
package okhttp3.compare

import assertk.assertThat
import assertk.assertions.isEqualTo
import assertk.assertions.isNull
import assertk.assertions.matches
import mockwebserver3.MockResponse
import mockwebserver3.MockWebServer
import org.eclipse.jetty.client.HttpClient
import org.junit.jupiter.api.AfterEach

		return false, errArithInvalidOperator
	}
	switch op {
	case opIs:
		if a.IsNull() {
			// Missing is null
			return v.IsNull() || v.IsMissing(), nil
		}
		if a.IsMissing() {
			return v.IsMissing(), nil
		}
		// Forward to Equal
		op = opEq
	case opIsNot:
		if a.IsNull() {
			// Missing is not null
			return !v.IsNull() && !v.IsMissing(), nil
		}
		if a.IsMissing() {
			return !v.IsMissing(), nil

```

////

/// info

`Body` also has all the same extra validation and metadata parameters as `Query`,`Path` and others you will see later.

///

## Embed a single body parameter

Let's say you only have a single `item` body parameter from a Pydantic model `Item`.

By default, **FastAPI** will then expect its body directly.

    assertThat(future.isDone()).isFalse();
    assertThat(future.tryInternalFastPathGetFailure()).isNull();
  }

  public void testTrustedGetFailure_canceledNoCause() {
    SettableFuture<String> future = SettableFuture.create();
    future.cancel(false);
    assertThat(future.tryInternalFastPathGetFailure()).isNull();
  }

  public void testGetFailure_completed() {

# Bigger Applications - Multiple Files

If you are building an application or a web API, it's rarely the case that you can put everything in a single file.

**FastAPI** provides a convenience tool to structure your application while keeping all the flexibility.

/// info

If you come from Flask, this would be the equivalent of Flask's Blueprints.

///

## An example file structure

Let's say you have a file structure like this:

```

 * limitations under the License.
 */
package okhttp3.internal.tls

import assertk.assertThat
import assertk.assertions.endsWith
import assertk.assertions.isEqualTo
import assertk.assertions.isNull
import assertk.assertions.startsWith
import java.io.IOException
import java.net.SocketException
import java.security.GeneralSecurityException
import java.security.SecureRandom
import java.security.cert.X509Certificate

* Memory
* Previous steps before starting

Up to this point, with all the tutorials in the docs, you have probably been running a **server program**, for example, using the `fastapi` command, that runs Uvicorn, running a **single process**.

When deploying applications you will probably want to have some **replication of processes** to take advantage of **multiple cores** and to be able to handle more requests.

   * generally guaranteed.
   */
  public static String toString(Iterable<?> iterable) {
    return Iterators.toString(iterable.iterator());
  }

  /**
   * Returns the single element contained in {@code iterable}.
   *
   * <p><b>Java 8+ users:</b> the {@code Stream} equivalent to this method is {@code
   * stream.collect(MoreCollectors.onlyElement())}.
   *

            return LIST_ITEM;
        }

        @Override
        public boolean isNull() {
            return (size() == 0);
        }

        void normalize() {
            for (int i = size() - 1; i >= 0; i--) {
                Item lastItem = get(i);

                if (lastItem.isNull()) {
                    if (i == size() - 1 || get(i + 1).getType() == STRING_ITEM) {