FastAPI will use this `response_model` to do all the data documentation, validation, etc. and also to **convert and filter the output data** to its type declaration.

/// tip

If you have strict type checks in your editor, mypy, etc, you can declare the function return type as `Any`.

import org.jspecify.annotations.NullUnmarked;

/** Benchmarks for the hashing of UTF-8 strings. */
@NullUnmarked
public class HashStringBenchmark {
  static class MaxCodePoint {
    final int value;

    /**
     * Convert the input string to a code point. Accepts regular decimal numerals, hex strings, and
     * some symbolic names meaningful to humans.
     */
    private static int decode(String userFriendly) {
      try {

		JobInfo: Job{
			Title:    "programmer",
			Number:   9920,
			Location: "Shadyside",
			IsIntern: false,
		},
		CustomSerializerString: "world",
	}

	// first time insert record
	out := SerializerStruct{}
	if err := DB.Assign(data).FirstOrCreate(&out).Error; err != nil {
		t.Fatalf("failed to FirstOrCreate Assigned data, got error %v", err)
	}

	var result SerializerStruct

Because the editor knows the types of the variables, you don't only get completion, you also get error checks:

<img src="/img/python-types/image04.png">

Now you know that you have to fix it, convert `age` to a string with `str(age)`:

{* ../../docs_src/python_types/tutorial004.py hl[2] *}

## Declaring types { #declaring-types }

You just saw the main place to declare type hints. As function parameters.

     *
     * @return the parent map
     */
    public Map<K, V> getParent() {
        return parent;
    }

    /**
     * Converts a key to camelCase.
     *
     * @param key the key to convert
     * @return the converted key
     */
    protected Object toCamelCase(final Object key) {
        if (key == null) {
            return key;
        }
        String keyStr = key.toString();

        "price": 42.0,
        "tax": 3.2
    },
    "user": {
        "username": "dave",
        "full_name": "Dave Grohl"
    },
    "importance": 5
}
```

Again, it will convert the data types, validate, document, etc.

## Multiple body params and query { #multiple-body-params-and-query }

Of course, you can also declare additional query parameters whenever you need, additional to any body parameters.

        sb.append(dm).append(threadName);
        sb.append(dm).append(url);
        if (sb.length() > dm.length()) {
            sb.delete(0, dm.length());
        }
        sb.insert(0, "{").append("}");
        return sb.toString();
    }

    // ===================================================================================

    }
  }

  /** Returns the product of {@code n1} exclusive through {@code n2} inclusive. */
  @SuppressWarnings("UseCorrectAssertInTests") // TODO(b/345814817): Remove or convert assertion.
  private static BigInteger oldSlowFactorial(int n1, int n2) {
    assert n1 <= n2;
    if (IntMath.log2(n2, CEILING) * (n2 - n1) < Long.SIZE - 1) {
      // the result will definitely fit into a long

        } catch (final SmbException se) {
            log.error("Failed to create builtin SIDs", se);
        }
    }

    /**
     * Convert a sid_t to byte array
     *
     * @param sid the RPC sid_t structure to convert
     * @return byte encoded form
     */
    public static byte[] toByteArray(final rpc.sid_t sid) {
        final byte[] dst = new byte[1 + 1 + 6 + sid.sub_authority_count * 4];

                    return null;
                });
    }

    /**
     * Creates an EditBody from a KuromojiItem entity for API responses.
     *
     * @param entity the KuromojiItem entity to convert
     * @param dictId the dictionary ID
     * @return the converted EditBody object
     */
    protected EditBody createEditBody(final KuromojiItem entity, final String dictId) {