{!> ../../docs_src/query_params_str_validations/tutorial002.py!}
```

////

Da wir in diesem Fall (ohne die Verwendung von `Annotated`) den Parameter-Defaultwert `None` mit `Query()` ersetzen, müssen wir nun dessen Defaultwert mit dem Parameter `Query(default=None)` deklarieren. Das dient demselben Zweck, `None` als Defaultwert für den Funktionsparameter zu setzen (zumindest für FastAPI).

Sprich:

```Python

import com.google.common.collect.ImmutableSet;
import java.io.FilterInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Arrays;

/** @author Colin Decker */
public class TestInputStream extends FilterInputStream {

  private final ImmutableSet<TestOption> options;
  private boolean closed;

      count.incrementAndGet();
      lastNotification = notification;
    }

    public int getCount() {
      return count.get();
    }

    public K getLastEvictedKey() {
      return lastNotification.getKey();
    }

    public V getLastEvictedValue() {
      return lastNotification.getValue();
    }

    public RemovalNotification<K, V> getLastNotification() {
      return lastNotification;
    }
  }

  }

  @Override
  public boolean contains(@CheckForNull Object object) {
    return map.containsKey(object);
  }

  @Override
  K get(int index) {
    return map.entrySet().asList().get(index).getKey();
  }

  @Override
  public void forEach(Consumer<? super K> action) {
    checkNotNull(action);
    map.forEach((k, v) -> action.accept(k));
  }

  @Override
  boolean isPartialView() {

            protected N computeNext() {
              while (entries.hasNext()) {
                Entry<N, Object> entry = entries.next();
                if (isPredecessor(entry.getValue())) {
                  return entry.getKey();
                }
              }
              return endOfData();
            }
          };
        } else {
          Iterator<NodeConnection<N>> nodeConnections = orderedNodeConnections.iterator();

import java.nio.ByteBuffer;
import java.util.zip.Checksum;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * {@link HashFunction} adapter for {@link Checksum} instances.
 *
 * @author Colin Decker
 */
@Immutable
@ElementTypesAreNonnullByDefault
final class ChecksumHashFunction extends AbstractHashFunction implements Serializable {
  private final ImmutableSupplier<? extends Checksum> checksumSupplier;

            elementStack.addFirst(name);
            visitor.onStartHtmlElement(name);
            for (Map.Entry<String, String> entry : attributes.entrySet()) {
                visitor.onHtmlElementAttribute(entry.getKey(), entry.getValue());
            }
            attributes.clear();
            visitor.onStartHtmlElementComplete(name);
        }

        @Override
        public void onEndHtmlElement(String name) {

  public void testPutDuplicateValue() {
    List<Entry<K, V>> entries = copyToList(multimap().entries());

    for (Entry<K, V> entry : entries) {
      resetContainer();
      K k = entry.getKey();
      V v = entry.getValue();

      Set<V> values = multimap().get(k);
      Set<V> expectedValues = copyToSet(values);

      assertFalse(multimap().put(k, v));
      assertEquals(expectedValues, values);

      count.incrementAndGet();
      lastNotification = notification;
    }

    public int getCount() {
      return count.get();
    }

    public K getLastEvictedKey() {
      return lastNotification.getKey();
    }

    public V getLastEvictedValue() {
      return lastNotification.getValue();
    }

    public RemovalNotification<K, V> getLastNotification() {
      return lastNotification;
    }
  }

                        null,
                        "version of a plugin must be defined. ",
                        plugin);
            }

            String key = plugin.getKey();

            Plugin existing = index.get(key);

            if (existing != null) {
                addViolation(
                        problems,
                        errOn31,