class Relay private constructor(
  /**
   * Read/write persistence of the upstream source and its metadata. Its layout is as follows:
   *
   *  * 16 bytes: either `OkHttp cache v1\n` if the persisted file is complete. This is another
   *    sequence of bytes if the file is incomplete and should not be used.
   *  * 8 bytes: *n*: upstream data size
   *  * 8 bytes: *m*: metadata size
   *  * *n* bytes: upstream data
   *  * *m* bytes: metadata
   *

To override a dependency for testing, you put as a key the original dependency (a function), and as the value, your dependency override (another function).

And then **FastAPI** will call that override instead of the original dependency.

{* ../../docs_src/dependency_testing/tutorial001_an_py310.py hl[26:27,30] *}

/// tip

					br.Close()
				}
				p.readers[i] = nil

				// Since ReadAt returned error, trigger another read.
				readTriggerCh <- true
				return
			}
			newBufLK.Lock()
			newBuf[bufIdx] = p.buf[bufIdx][:n]
			newBufLK.Unlock()
			// Since ReadAt returned success, there is no need to trigger another read.
			readTriggerCh <- false
		}(readerIndex)
		readerIndex++
	}
	wg.Wait()

 *
 * @author Chris Nokleberg
 * @since 1.0
 */
@J2ktIncompatible
@GwtIncompatible
public final class CountingOutputStream extends FilterOutputStream {

  private long count;

  /**
   * Wraps another output stream, counting the number of bytes written.
   *
   * @param out the output stream to be wrapped
   */
  public CountingOutputStream(OutputStream out) {
    super(checkNotNull(out));
  }

///

### <a href="https://falconframework.org/" class="external-link" target="_blank">Falcon</a> { #falcon }

Falcon is another high performance Python framework, it is designed to be minimal, and work as the foundation of other frameworks like Hug.

/**
 * The option of a command-line tool where to place the paths to some dependencies.
 * A {@code PathType} can identify the Java class-path, the Java module path,
 * or another kind of path for another programming language for example.
 * Path types are often exclusive. For example, a dependency should not be
 * both on the Java class path and on the Java module path.
 *

The `app_name` would be `"ChimichangApp"`.

And the `items_per_user` would keep its default value of `50`.

## Settings in another module { #settings-in-another-module }

You could put those settings in another module file as you saw in [Bigger Applications - Multiple Files](../tutorial/bigger-applications.md){.internal-link target=_blank}.

For example, you could have a file `config.py` with:

/**
 * GWT emulation of {@link RegularImmutableSortedSet}.
 *
 * @author Hayward Chan
 */
final class RegularImmutableSortedSet<E> extends ImmutableSortedSet<E> {
  /** true if this set is a subset of another immutable sorted set. */
  final boolean isSubset;

  RegularImmutableSortedSet(SortedSet<E> delegate, boolean isSubset) {
    super(delegate);
    this.isSubset = isSubset;
  }

  @Override

import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.Collection;
import java.util.List;

/**
 * Reserializes the sets created by another test set generator.
 *
 * <p>TODO: make CollectionTestSuiteBuilder test reserialized collections
 *
 * @author Jesse Wilson
 */
@GwtIncompatible

import com.google.common.annotations.J2ktIncompatible;
import java.util.concurrent.Callable;
import org.jspecify.annotations.Nullable;

/**
 * A listening executor service which forwards all its method calls to another listening executor
 * service. Subclasses should override one or more methods to modify the behavior of the backing
 * executor service as desired per the <a