- type: textarea
    id: expected
    attributes:
      label: What did you expect to happen?
    validations:
      required: true

  - type: textarea
    id: repro
    attributes:
      label: How can we reproduce it (as minimally and precisely as possible)?
    validations:
      required: true

  - type: textarea
    id: additional
    attributes:
      label: Anything else we need to know?

In this guide, you'll learn how to generate a **TypeScript SDK** for your FastAPI backend.

## Open Source SDK Generators { #open-source-sdk-generators }

package com.google.common.collect.testing;

import com.google.common.annotations.GwtCompatible;

/**
 * A type which will never be used as the element type of any collection in our tests, and so can be
 * used to test how a Collection behaves when given input of the wrong type.
 */
@GwtCompatible
public enum WrongType {
  VALUE

    protected final List<Map<String, Object>> documentList;

    /** The total number of records that match the search criteria. */
    protected final long allRecordCount;

    /** The relation type indicating how the record count should be interpreted (e.g., "eq", "gte"). */
    protected final String allRecordCountRelation;

    /** The time taken to execute the search query in milliseconds. */
    protected final long queryTime;

 */
package org.codelibs.core.misc;

import junit.framework.TestCase;

/**
 * @author higa
 *
 */
public class Base64UtilTest extends TestCase {

    private static final String ORIGINAL = "how now brown cow\r\n";

    private static final byte[] BINARY_DATA = ORIGINAL.getBytes();

    private static final String ENCODED_DATA = "aG93IG5vdyBicm93biBjb3cNCg==";

    /**
     * @throws Exception
     */

* <a href="https://x.com/tiangolo" class="external-link" target="_blank">Follow me on **X (Twitter)**</a> or <a href="https://fosstodon.org/@tiangolo" class="external-link" target="_blank">Mastodon</a>.
    * Tell me how you use FastAPI (I love to hear that).
    * Hear when I make announcements or release new tools.

 {{{https://cwiki.apache.org/confluence/display/MAVEN/Plugin+migration+to+Maven3+dependencies} Plugin migration to Maven3 dependencies}}

	}
	result := objLayer.Health(ctx, opts)
	w.Header().Set(xhttp.MinIOWriteQuorum, strconv.Itoa(result.WriteQuorum))
	w.Header().Set(xhttp.MinIOStorageClassDefaults, strconv.FormatBool(result.UsingDefaults))
	// return how many drives are being healed if any
	if result.HealingDrives > 0 {
		w.Header().Set(xhttp.MinIOHealingDrives, strconv.Itoa(result.HealingDrives))
	}
	if !result.Healthy {

        }
    ]
}
```

/// info

Notice how the `images` key now has a list of image objects.

///

## Deeply nested models { #deeply-nested-models }

You can define arbitrarily deeply nested models:

{* ../../docs_src/body_nested_models/tutorial007_py310.py hl[7,12,18,21,25] *}

/// info

Notice how `Offer` has a list of `Item`s, which in turn have an optional list of `Image`s

Create a function to be run as the background task.

It is just a standard function that can receive parameters.

It can be an `async def` or normal `def` function, **FastAPI** will know how to handle it correctly.

In this case, the task function will write to a file (simulating sending an email).

And as the write operation doesn't use `async` and `await`, we define the function with normal `def`: