* for all request types within the Maven service layer, providing access to session context
 * and request tracing capabilities.
 *
 * <p>Each request is associated with a {@link ProtoSession} that contains the configuration
 * and context necessary for request processing, including:
 * <ul>
 *   <li>User and system properties for interpolation</li>

        validateParameters();
    }

    @Override
    public boolean isValid(final CharSequence value, final ConstraintValidatorContext context) {
        if (value == null) {
            return true;
        }

        final HibernateConstraintValidatorContext hibernateContext = context.unwrap(HibernateConstraintValidatorContext.class);
        hibernateContext.disableDefaultConstraintViolation();

        assertThat(ClassLoaderUtil.getClassLoader(TestCase.class), is(sameInstance(TestCase.class.getClassLoader())));

        final ClassLoader context = Thread.currentThread().getContextClassLoader();
        try {
            final ClassLoader cl = new URLClassLoader(new URL[0], getClass().getClassLoader());
            Thread.currentThread().setContextClassLoader(cl);

    }

    /**
     * Returns the context class loader.
     *
     * @return the context class loader
     */
    public static ClassLoader getClassLoader() {
        return Thread.currentThread().getContextClassLoader();
    }

    /**
     * Returns the resource from the context class loader.
     *
     * @param path

     * with specified mechanism.
     *
     * @param source
     *            the {@link SSPContext} to be wrapped
     * @param mech
     *            the mechanism is being used for this context.
     */
    SpnegoContext(final Configuration config, final SSPContext source, final ASN1ObjectIdentifier[] mech) {
        this.mechContext = source;
        this.mechs = mech;

        }
    }

    /**
     * Sets the query builder for this context.
     * @param queryBuilder The query builder to use.
     */
    public void setQueryBuilder(final QueryBuilder queryBuilder) {
        this.queryBuilder = queryBuilder;
    }

    /**
     * Adds sort builders to the query context.
     * @param sortBuilders Variable number of sort builders to add.
     */

### Async Context Manager

Si revisas, la función está decorada con un `@asynccontextmanager`.

Eso convierte a la función en algo llamado un "**async context manager**".

{* ../../docs_src/events/tutorial003.py hl[1,13] *}

Un **context manager** en Python es algo que puedes usar en una declaración `with`, por ejemplo, `open()` puede ser usado como un context manager:

```Python

/**
 * Base class for testers of classes (including {@link Collection} and {@link java.util.Map Map})
 * that contain elements.
 *
 * @param <C> the type of the container
 * @param <E> the type of the container's contents
 * @author George van den Driessche
 */
@GwtCompatible
@Ignore("test runners must not instantiate and run this directly, only via suites we build")

        assertThat(q).containsExactlyElementsIn(contents);
        q.add(next);
        contents.add(next);
        assertThat(q).containsExactlyElementsIn(contents);
        q.remove(i);
        assertTrue(contents.remove(Integer.valueOf(i)));
        assertThat(q).containsExactlyElementsIn(contents);
        assertEquals(next, q.poll());
        contents.remove(next);

     * @return session instance with the given type
     */
    <T extends SmbSession> T unwrap(Class<T> type);

    /**
     * Returns the CIFS context that this session is attached to.
     *
     * @return the context this session is attached to
     */
    CIFSContext getContext();