//    second thread can then dispatch to the subscriber it took before the first thread does.
    //
    // All this makes me really wonder if there's any value in queueing here at all. A dispatcher
    // that simply loops through the subscribers and dispatches the event to each would actually
    // probably provide a stronger order guarantee, though that order would obviously be different
    // in some cases.

 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.internal.impl;

import javax.inject.Inject;
import javax.inject.Named;
import javax.inject.Singleton;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;

  /**
   * This is invoked for the last bytes of the input, which are not enough to fill a whole chunk.
   * The passed {@code ByteBuffer} is guaranteed to be non-empty.
   *
   * <p>This implementation simply pads with zeros and delegates to {@link #process(ByteBuffer)}.
   */
  protected void processRemaining(ByteBuffer bb) {
    Java8Compatibility.position(bb, bb.limit()); // move at the end

    /*
     * Except for \n, \t, and \r, all ASCII control characters are replaced with the Unicode
     * replacement character.
     *
     * Implementation note: An alternative to the following would be to make a map that simply
     * replaces the allowed ASCII whitespace characters with themselves and to set the minimum safe
     * character to 0x20. However this would slow down the escaping of simple strings that contain
     * \t, \n, or \r.

 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.internal.transformation.impl;

import javax.inject.Inject;
import javax.inject.Named;
import javax.inject.Singleton;
import javax.xml.stream.XMLStreamException;

import java.io.IOException;
import java.io.Writer;

import org.apache.maven.api.cli.mvn.MavenOptions;
import org.apache.maven.api.cli.mvn.forked.ForkedMavenInvoker;
import org.apache.maven.api.cli.mvn.forked.ForkedMavenInvokerRequest;
import org.apache.maven.internal.impl.model.profile.Os;

import static java.util.Objects.requireNonNull;

/**
 * Forked invoker implementation, it spawns a subprocess with Maven.
 */
public class DefaultForkedMavenInvoker implements ForkedMavenInvoker {

h3. Creation of an isolated classloader

////

//// tab | non-Annotated

```Python
q: Union[str, None] = Query(default=None, min_length=3)
```

////

So, when you need to declare a value as required while using `Query`, you can simply not declare a default value:

//// tab | Python 3.9+

```Python hl_lines="9"
{!> ../../docs_src/query_params_str_validations/tutorial006_an_py39.py!}
```

////

//// tab | Python 3.8+

import org.eclipse.aether.version.InvalidVersionSpecificationException;
import org.eclipse.aether.version.VersionScheme;

import static java.util.Objects.requireNonNull;

/**
 * @deprecated since 4.0.0, use {@code maven-api-impl} jar instead
 */
@Named
@Singleton
@Deprecated(since = "4.0.0")
public class DefaultModelVersionParser implements ModelVersionParser {
    private static final String SNAPSHOT = "SNAPSHOT";

    while (n > 0) {
      long amt = reader.skip(n);
      if (amt == 0) {
        throw new EOFException();
      }
      n -= amt;
    }
  }

  /**
   * Returns a {@link Writer} that simply discards written chars.
   *
   * @since 15.0
   */
  public static Writer nullWriter() {
    return NullWriter.INSTANCE;
  }

  private static final class NullWriter extends Writer {