Jinzhu <******@****.***> 1756991596 +0800

    validations:
      required: true

  - type: textarea
    id: generics-proposal
    attributes:
      label: Is this about generics?
      description: If so, how does this relate to the accepted design and other generics proposals?
      placeholder: |
       Yes or No

       If yes, 
        1. how does this relate to the accepted design and other generics proposals?

    validations:
      required: true

		},
		{
			Name:     "generics-nested-joins-2",
			Manager:  GetUser("generics-nested-joins-manager-2", Config{Company: true, NamedPet: true}),
			NamedPet: &Pet{Name: "generics-nested-joins-namepet-2", Toy: Toy{Name: "generics-nested-joins-namepet-toy-2"}},
		},
	}

	ctx := context.Background()
	db := gorm.G[User](DB)

  }

  private static class StringWrapper {
    private final String value;

    StringWrapper(String value) {
      this.value = value;
    }
  }

  @GwtIncompatible // J2CL generics problem
  public void testAndThen() {
    Converter<StringWrapper, String> first =
        new Converter<StringWrapper, String>() {
          @Override
          protected String doForward(StringWrapper object) {

import com.google.common.annotations.GwtIncompatible;
import com.google.common.annotations.J2ktIncompatible;
import org.jspecify.annotations.NullUnmarked;

/** Simple derived class to verify that we handle generics correctly. */
@GwtCompatible
@NullUnmarked
class Derived extends Base {
  public Derived(String s) {
    super(s);
  }

  @GwtIncompatible @J2ktIncompatible private static final long serialVersionUID = 0;

- **Type safety** - Extensive use of generics and null-safe operations throughout the API
- **Resource management** - Proper handling of resources with utilities like `CloseableUtil` and `DisposableUtil`

### Key Architectural Patterns
- **Factory Pattern** - `BeanDescFactory` for creating bean descriptors, `ParameterizedClassDescFactory` for generic type handling

import com.google.common.annotations.GwtCompatible;
import com.google.common.annotations.GwtIncompatible;
import com.google.common.annotations.J2ktIncompatible;

/**
 * Simple derived class to verify that we handle generics correctly.
 *
 * @author Kevin Bourrillion
 */
@GwtCompatible
public class DerivedComparable extends BaseComparable {
  public DerivedComparable(String s) {
    super(s);
  }

#### Generische Typen

Diese Typen, die Typ-Parameter in eckigen Klammern akzeptieren, werden **generische Typen** oder **Generics** genannt.

//// tab | Python 3.10+

Sie können die eingebauten Typen als Generics verwenden (mit eckigen Klammern und Typen darin):

* `list`
* `tuple`
* `set`
* `dict`

Verwenden Sie für den Rest, wie unter Python 3.8, das `typing`-Modul:

import com.google.common.annotations.GwtCompatible;
import com.google.common.annotations.GwtIncompatible;
import com.google.common.annotations.J2ktIncompatible;

/**
 * Simple derived class to verify that we handle generics correctly.
 *
 * @author Kevin Bourrillion
 */
@GwtCompatible
public class DerivedComparable extends BaseComparable {
  public DerivedComparable(String s) {
    super(s);
  }

And then you won't have to worry about names like `Optional` and `Union`. 😎

#### Generic types { #generic-types }

These types that take type parameters in square brackets are called **Generic types** or **Generics**, for example:

//// tab | Python 3.10+

You can use the same builtin types as generics (with square brackets and types inside):

* `list`
* `tuple`
* `set`
* `dict`