# Body - Multiple Parameters

Now that we have seen how to use `Path` and `Query`, let's see more advanced uses of request body declarations.

## Mix `Path`, `Query` and body parameters

First, of course, you can mix `Path`, `Query` and request body parameter declarations freely and **FastAPI** will know what to do.

And you can also declare body parameters as optional, by setting the default to `None`:

//// tab | Python 3.10+

     */
    @Nonnull
    List<Node> getNodes();

    /**
     * Returns the file paths of all dependencies, regardless on which tool option those paths should be placed.
     * The returned list may contain a mix of Java class-path, Java module-path, and other types of path elements.
     * This collection has the same content than {@code getDependencies.values()} except that it does not contain
     * null elements.
     *

## Authentication

The agent supports two forms of authentication with the CA/discovery servers: mTLS and JWT. Varying deployment
topologies mix and match these two.

For a standard Kubernetes deployment, both CA and discovery will use JWT authentication, with a token automatically

    return k1;
  }

  private static int mixH1(int h1, int k1) {
    h1 ^= k1;
    h1 = Integer.rotateLeft(h1, 13);
    h1 = h1 * 5 + 0xe6546b64;
    return h1;
  }

  // Finalization mix - force all bits of a hash block to avalanche
  private static HashCode fmix(int h1, int length) {
    h1 ^= length;
    h1 ^= h1 >>> 16;
    h1 *= 0x85ebca6b;
    h1 ^= h1 >>> 13;
    h1 *= 0xc2b2ae35;

			Owner:  owners[i%len(owners)],
			Group:  true,
			Quorum: 3,
		}
		lris = append(lris, lri)
		locksHeld[resource] = []lockRequesterInfo{lri}
	}

	// Add a few concurrent read locks to the mix
	for i := 0; i < 50; i++ {
		resource := fmt.Sprintf("bucket/get-object-%d", i)
		lri := lockRequesterInfo{
			Name:   resource,
			UID:    mustGetUUID(),
			Owner:  owners[i%len(owners)],
			Quorum: 2,
		}

		cause:      err,
	}
}

func errParseCannotMixSqbAndWildcardInSelectList(err error) *s3Error {
	return &s3Error{
		code:       "ParseCannotMixSqbAndWildcardInSelectList",
		message:    "Cannot mix [] and * in the same expression in a SELECT list in SQL expression.",
		statusCode: 400,
		cause:      err,
	}
}

// ////////////////////////////////////////////////////////////////////////////////////
//

 * {@code String} and a {@code String} to a {@code long} that treat the {@code long} as an unsigned
 * number.
 *
 * <p>Users of these utilities must be <i>extremely careful</i> not to mix up signed and unsigned
 * {@code long} values. When possible, it is recommended that the {@link UnsignedLong} wrapper class
 * be used, at a small efficiency penalty, to enforce the distinction in the type system.
 *

 * {@code String} and a {@code String} to an {@code int} that treat the {@code int} as an unsigned
 * number.
 *
 * <p>Users of these utilities must be <i>extremely careful</i> not to mix up signed and unsigned
 * {@code int} values. When possible, it is recommended that the {@link UnsignedInteger} wrapper
 * class be used, at a small efficiency penalty, to enforce the distinction in the type system.
 *

 * {@code String} and a {@code String} to an {@code int} that treat the {@code int} as an unsigned
 * number.
 *
 * <p>Users of these utilities must be <i>extremely careful</i> not to mix up signed and unsigned
 * {@code int} values. When possible, it is recommended that the {@link UnsignedInteger} wrapper
 * class be used, at a small efficiency penalty, to enforce the distinction in the type system.
 *

// the ack only has temporal correlation (i.e. it is the first and only ack msg after the message was sent)
// All this to say, that we want to make sure that message to ztunnel are sent from a single goroutine
// so we don't mix messages and acks.
// nolint: unparam
func (z *ztunnelServer) handleConn(ctx context.Context, conn *ZtunnelConnection) error {
	defer conn.Close()

	context.AfterFunc(ctx, func() {