assertEquals(4, c.getDeclaredFields().length, "Unexpected number of fields");
        assertEquals(0, c.getDeclaredMethods().length, "No declared methods expected");
        assertEquals(0, c.getDeclaredConstructors().length, "Interfaces have no constructors");
    }

    @Test
    @DisplayName("Fields are public static final Strings with expected values")
    void fieldModifiersAndTypes() throws Exception {

     * Specifies the language preference if redirection fails.
     */
    public String lang;

    /**
     * Additional fields map for error page fallback.
     * Contains extra search parameters as key-value pairs if redirection fails.
     */
    public Map<String, String[]> fields = new HashMap<>();

		expr := clause.Expr{SQL: "count(*)"}

		if len(tx.Statement.Selects) == 1 {
			dbName := tx.Statement.Selects[0]
			fields := strings.FieldsFunc(dbName, utils.IsValidDBNameChar)
			if len(fields) == 1 || (len(fields) == 3 && (strings.ToUpper(fields[1]) == "AS" || fields[1] == ".")) {
				if tx.Statement.Parse(tx.Statement.Model) == nil {
					if f := tx.Statement.Schema.LookUpField(dbName); f != nil {

        negotiation = new SmbNegotiation(mockRequest, mockResponse, testRequestBuffer, testResponseBuffer);
    }

    @Test
    @DisplayName("Constructor should properly initialize all fields")
    void testConstructor() {
        // Verify all fields are properly initialized
        assertNotNull(negotiation);
        assertSame(mockRequest, negotiation.getRequest());
        assertSame(mockResponse, negotiation.getResponse());

Por exemplo, você pode usar isso para adicionar metadados para uma interface de usuário de front-end, etc.

///

## `Field` de argumentos adicionais

Ao usar `Field ()` com modelos Pydantic, você também pode declarar informações extras para o **JSON Schema** passando quaisquer outros argumentos arbitrários para a função.

        assertEquals(1L, getSerialVersionUID());
    }

    private long getSerialVersionUID() {
        try {
            java.lang.reflect.Field field = FessMessages.class.getDeclaredField("serialVersionUID");
            field.setAccessible(true);
            return field.getLong(null);
        } catch (Exception e) {
            fail("Failed to get serialVersionUID: " + e.getMessage());
            return -1;
        }

For example, in one of the ways the OAuth2 specification can be used (called "password flow") it is required to send a `username` and `password` as form fields.

The <abbr title="specification">spec</abbr> requires the fields to be exactly named `username` and `password`, and to be sent as form fields, not JSON.

    }

    public void test_fields() {
        final Map<String, String[]> fields = Collections.singletonMap("title", new String[] { "test" });
        assertEquals("title:\"test\"", getQuery("", new String[0], fields, Collections.emptyMap(), false));

        final Map<String, String[]> multiFields = Collections.singletonMap("content", new String[] { "value1", "value2" });

	Metrics bool   `msg:"m"`
	NoOp    bool   `msg:"np"`
}

// DiskInfo is an extended type which returns current
// disk usage per path.
// The above means that any added/deleted fields are incompatible.
//
// The above means that any added/deleted fields are incompatible.
//
//msgp:tuple DiskInfo
type DiskInfo struct {
	Total      uint64
	Free       uint64
	Used       uint64
	UsedInodes uint64
	FreeInodes uint64

}

func ExampleFields() {
	fmt.Printf("Fields are: %q", bytes.Fields([]byte("  foo bar  baz   ")))
	// Output: Fields are: ["foo" "bar" "baz"]
}

func ExampleFieldsFunc() {
	f := func(c rune) bool {
		return !unicode.IsLetter(c) && !unicode.IsNumber(c)
	}
	fmt.Printf("Fields are: %q", bytes.FieldsFunc([]byte("  foo1;bar2,baz3..."), f))
	// Output: Fields are: ["foo1" "bar2" "baz3"]
}