E você também pode declarar parâmetros de corpo como opcionais, definindo o valor padrão com `None`:

{* ../../docs_src/body_multiple_params/tutorial001_py310.py hl[17:19] *}

/// note | Nota

Repare que, neste caso, o `item` que seria capturado a partir do corpo é opcional. Visto que ele possui `None` como valor padrão.

///

## Múltiplos parâmetros de corpo

    }

    @ParameterizedTest
    @DisplayName("Test valid share names")
    @ValueSource(strings = { "share", "share$", "SHARE", "share123", "share-name", "share_name", "share.name" })
    void testValidShareNames(String share) {
        assertDoesNotThrow(() -> InputValidator.validateShareName(share));
    }

    @Test
    @DisplayName("Test port validation")
    void testPortValidation() {

        @ParameterizedTest
        @DisplayName("Should calculate correct size for various path lengths")
        @CsvSource({ "'', 4", "'a', 6", "'\\\\', 8", "'\\\\server', 20", "'\\\\server\\share', 32", "'\\\\server\\share\\path', 42",
                "'\\\\server\\share\\very\\long\\path\\with\\many\\segments', 100" })
        void testSizeCalculation(String path, int expectedSize) {
            buffer = new DfsReferralRequestBuffer(path, 3);

## Embeber un solo parámetro de cuerpo

Supongamos que solo tienes un único parámetro de cuerpo `item` de un modelo Pydantic `Item`.

Por defecto, **FastAPI** esperará su cuerpo directamente.

Pero si deseas que espere un JSON con una clave `item` y dentro de ella los contenidos del modelo, como lo hace cuando declaras parámetros de cuerpo extra, puedes usar el parámetro especial `Body` `embed`:

```Python
item: Item = Body(embed=True)
```

     * the share permissions on the share exporting this file or directory.
     * If no DACL is present, null is returned. If the DACL is empty, an array with 0 elements is returned.
     * <p>
     * Note that this is different from calling <code>getSecurity</code> on a
     * share. There are actually two different ACLs for shares - the ACL on
     * the share and the ACL on the folder being shared.

	return predicate{
		func(r rune) bool {
			return !p.f(r)
		},
		"not " + p.name,
	}
}

var trimFuncTests = []TrimFuncTest{
	{isSpace, space + " hello " + space,
		[]byte("hello"),
		[]byte("hello " + space),
		[]byte(space + " hello")},
	{isDigit, "\u0e50\u0e5212hello34\u0e50\u0e51",
		[]byte("hello"),
		[]byte("hello34\u0e50\u0e51"),
		[]byte("\u0e50\u0e5212hello")},

        // Normal extensions should be allowed
        assertEquals("\\share\\file.txt", validator.validatePath("\\share\\file.txt"));
        assertEquals("\\share\\document.docx", validator.validatePath("\\share\\document.docx"));
        assertEquals("\\share\\archive.tar.gz", validator.validatePath("\\share\\archive.tar.gz"));
    }

    @Test
    public void testInternationalCharacters() throws Exception {

        SmbResourceLocatorImpl a = locator("smb://server/share/dir/file.txt");
        assertEquals("file.txt", a.getName());

        // share name with trailing slash when only share present
        SmbResourceLocatorImpl b = locator("smb://server/share/");
        assertEquals("share/", b.getName());

        // host when no path/share
        SmbResourceLocatorImpl c = locator("smb://server/");

            "share, " // empty service
    })
    void getSmbTree_invalid(String share, String service) {
        doThrow(new IllegalArgumentException("invalid share/service")).when(session).getSmbTree(eq(share), eq(service));

        IllegalArgumentException ex = assertThrows(IllegalArgumentException.class, () -> session.getSmbTree(share, service));
        assertTrue(ex.getMessage().contains("invalid"));

	// TODO(dsnet): Re-enable this when adding sparse support.
	// See https://golang.org/issue/22735
	/*
		// Handle sparse files.
		var spd sparseDatas
		var spb []byte
		if len(hdr.SparseHoles) > 0 {
			sph := append([]sparseEntry{}, hdr.SparseHoles...) // Copy sparse map
			sph = alignSparseEntries(sph, hdr.Size)
			spd = invertSparseEntries(sph, hdr.Size)

			// Format the sparse map.