And Pydantic's `Field` returns an instance of `FieldInfo` as well.

`Body` also returns objects of a subclass of `FieldInfo` directly. And there are others you will see later that are subclasses of the `Body` class.

Remember that when you import `Query`, `Path`, and others from `fastapi`, those are actually functions that return special classes.

///

/// tip

		l = tls.NewListener(listener, tlsConfig)
	}

	serve = func() error {
		return srv.Server.Serve(l)
	}

	return
}

// Shutdown - shuts down HTTP server.
func (srv *Server) Shutdown() error {
	srv.listenerMutex.Lock()
	if srv.listener == nil {
		srv.listenerMutex.Unlock()
		return http.ErrServerClosed
	}
	srv.listenerMutex.Unlock()

  /**
   * Asserts that the current response was redirected and returns the prior response.
   */
  fun priorResponse(): RecordedResponse {
    val priorResponse = response!!.priorResponse!!
    return RecordedResponse(priorResponse.request, priorResponse, null, null, null)
  }

  /**
   * Asserts that the current response used the network and returns the network response.
   */
  fun networkResponse(): RecordedResponse {

  void SetTargets(std::initializer_list<TF_Operation*> targets);

  void Run(TF_Status* s);

  void CloseAndDelete(TF_Status* s);

  TF_Tensor* output_tensor(int i) { return output_values_[i]; }

  TF_Session* mutable_session() { return session_; }

 private:
  void DeleteInputValues();
  void ResetOutputValues();

  TF_Session* session_;
  std::vector<TF_Output> inputs_;

       */
      seenExceptionsLocal = requireNonNull(seenExceptions);
    }
    return seenExceptionsLocal;
  }

  /** Populates {@code seen} with the exception that was passed to {@code setException}. */
  abstract void addInitialException(Set<Throwable> seen);

  final int decrementRemainingAndGet() {
    return ATOMIC_HELPER.decrementAndGetRemainingCount(this);
  }

  final void clearSeenExceptions() {

    protected abstract List<Byte> create(Byte[] elements);

    @Override
    public Byte[] createArray(int length) {
      return new Byte[length];
    }

    /** Returns the original element list, unchanged. */
    @Override
    public List<Byte> order(List<Byte> insertionOrder) {
      return insertionOrder;
    }
  }

  public static class SampleBytes extends SampleElements<Byte> {
    public SampleBytes() {

    protected abstract List<Long> create(Long[] elements);

    @Override
    public Long[] createArray(int length) {
      return new Long[length];
    }

    /** Returns the original element list, unchanged. */
    @Override
    public List<Long> order(List<Long> insertionOrder) {
      return insertionOrder;
    }
  }

  public static class SampleLongs extends SampleElements<Long> {
    public SampleLongs() {

	// the file it points to has been changed we will use the updated symlink.
	argv0, err := exec.LookPath(os.Args[0])
	if err != nil {
		return err
	}

	// Invokes the execve system call.
	// Re-uses the same pid. This preserves the pid over multiple server-respawns.
	return syscall.Exec(argv0, os.Args, os.Environ())
}

// freezeServices will freeze all incoming S3 API calls.

    assertEquals(
        "Map.merge(present, value, function) should return function result",
        v4(),
        getMap()
            .merge(
                k0(),
                v3(),
                (oldV, newV) -> {
                  assertEquals(v0(), oldV);
                  assertEquals(v3(), newV);
                  return v4();
                }));
    expectReplacement(entry(k0(), v4()));
  }

			return
		}
	}
	// write "Checksum"
	err = en.Append(0xa8, 0x43, 0x68, 0x65, 0x63, 0x6b, 0x73, 0x75, 0x6d)
	if err != nil {
		return
	}
	err = en.WriteString(z.Checksum)
	if err != nil {
		err = msgp.WrapError(err, "Checksum")
		return
	}
	return
}

// MarshalMsg implements msgp.Marshaler
func (z *ServerSystemConfig) MarshalMsg(b []byte) (o []byte, err error) {