Without a data validation system, you would have to do all the checks by hand, in code.

These features are what Marshmallow was built to provide. It is a great library, and I have used it a lot before.

    return processor.getResult();
  }

  /**
   * Reads some bytes from an input stream and stores them into the buffer array {@code b}. This
   * method blocks until {@code len} bytes of input data have been read into the array, or end of
   * file is detected. The number of bytes read is returned, possibly zero. Does not close the
   * stream.
   *

     * only under concurrent modification).
     *
     * To access these fields when you know that they are not null, call the pred() and succ()
     * methods, which perform null checks before returning the fields.
     */
    @CheckForNull private AvlNode<E> pred;
    @CheckForNull private AvlNode<E> succ;

    AvlNode(@ParametricNullness E elem, int elemCount) {

   * be exploited to create security vulnerabilities, especially when executable files are to be
   * written into the directory.
   *
   * <p>This method assumes that the temporary volume is writable, has free inodes and free blocks,
   * and that it will not be called thousands of times per second.
   *
   * <p><b>{@link java.nio.file.Path} equivalent:</b> {@link
   * java.nio.file.Files#createTempDirectory}.
   *

  // operation (because it implements the CSI ControllerPublishVolume()
  // method), and that the Kubernetes attach detach controller should call
  // the attach volume interface which checks the volumeattachment status
  // and waits until the volume is attached before proceeding to mounting.
  // The CSI external-attacher coordinates with CSI volume driver and updates

- kubeadm no longer performs IPVS checks as part of its preflight checks ([#81791](https://github.com/kubernetes/kubernetes/pull/81791), [@yastij](https://github.com/yastij))

These rules are checked dynamically at runtime. The checking is
controlled by the cgocheck setting of the GODEBUG environment
variable. The default setting is GODEBUG=cgocheck=1, which implements
reasonably cheap dynamic checks. These checks may be disabled
entirely using GODEBUG=cgocheck=0. Complete checking of pointer
handling, at some cost in run time, is available by setting
GOEXPERIMENT=cgocheck2 at build time.

		// In case of SSE-C objects copy the allowed internal headers as well
		if !isSSEC || !slices.Contains(maps.Keys(validSSEReplicationHeaders), k) {
			if stringsHasPrefixFold(k, ReservedMetadataPrefixLower) {
				continue
			}
			if isStandardHeader(k) {
				continue
			}
		}
		if slices.Contains(maps.Keys(validSSEReplicationHeaders), k) {
			meta[validSSEReplicationHeaders[k]] = v
		} else {

			default:
				internalLogIf(ctx, err)
			}
			if retries >= maxTries {
				return err
			}
			retries++
			time.Sleep(retryDelay)
		}
		return nil
	})

	// Blocks while consuming entries or an error occurs.
	err = bw.Close()
	if err != nil {
		mc.setErr(err.Error())
	}
	metaMu.Lock()
	defer metaMu.Unlock()
	if mc.meta.error != "" {
		return err
	}

     */
    @Nonnull
    Path getPathForRemoteArtifact(@Nonnull RemoteRepository remote, @Nonnull Artifact artifact);

    /**
     * Checks whether a given artifact version is considered a {@code SNAPSHOT} or not.
     * <p>
     * Shortcut for {@code getService(ArtifactManager.class).isSnapshot(...)}.
     * <p>