* </p>
     * <p>
     * If <code>type</code> is a parameterized type but has no direct type arguments, an empty array is returned.
     * This includes cases where the parameterized type contains nested types without type arguments.
     * </p>
     * <p>
     * If <code>type</code> is not a parameterized type, <code>null</code> is returned.
     * </p>
     *
     * @param type

## Параметризуем экземпляр { #parameterize-the-instance }

Теперь мы можем использовать `__init__`, чтобы объявить параметры экземпляра, с помощью которых будем «параметризовать» зависимость:

{* ../../docs_src/dependencies/tutorial011_an_py39.py hl[9] *}

     * <p>
     * If the type is not parameterized, an empty {@link Map} is returned.
     * </p>
     *
     * @param beanClass
     *            The parameterized type (class or interface). Must not be {@literal null}.
     * @return A {@link Map} with type variables as keys and type arguments as values for the parameterized type.
     */

Donc :

```Python
q: Union[str, None] = Query(default=None)
```

... rend le paramètre optionnel, et est donc équivalent à :

```Python
q: Union[str, None] = None
```

Mais déclare explicitement `q` comme étant un paramètre de requête.

/// info

import java.lang.reflect.ParameterizedType;

/**
 * Interface for handling parameterized classes.
 *
 * @author koichik
 */
public interface ParameterizedClassDesc {

    /**
     * Returns <code>true</code> if the class represented by this instance is parameterized.
     *
     * @return <code>true</code> if the class represented by this instance is parameterized
     */
    boolean isParameterizedClass();

    /**

     *
     * @param index
     *            the index of the parameter
     * @return {@literal true} if the parameter type at the specified index is parameterized
     */
    boolean isParameterized(int index);

    /**
     * Returns {@literal true} if the return type is parameterized.
     *

    /**
     * Returns {@literal true} if this property is parameterized.
     *
     * @return {@literal true} if this property is parameterized
     */
    boolean isParameterized();

    /**
     * Returns the information if this property is parameterized.
     *
     * @return the information if this property is parameterized, otherwise {@literal null}
     */

import java.util.Collection;
import org.jspecify.annotations.NullUnmarked;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;

/** Tests for an undirected {@link StandardMutableGraph}. */
@AndroidIncompatible
@RunWith(Parameterized.class)
@NullUnmarked
public class StandardMutableUndirectedGraphTest extends AbstractStandardUndirectedGraphTest {

     *
     * @param index
     *            The index of the parameter
     * @return The key type if the parameter type is a parameterized {@link Map}, otherwise {@literal null}
     */
    Class<?> getKeyClassOfMap(int index);

    /**
     * Returns the value type if the parameter type of the method is a parameterized {@link Map}.
     *
     * @param index

     * Returns the element type if this field is a parameterized {@link Collection}.
     *
     * @return the element type if this field is a parameterized {@link Collection}, otherwise {@literal null}
     */
    Class<?> getElementClassOfCollection();

    /**
     * Returns the key type if this field is a parameterized {@link Map}.
     *
     * @return the key type if this field is a parameterized {@link Map}, otherwise {@literal null}
     */