Path path = rootBuildDirectory.resolve(RESUME_PROPERTIES_FILENAME);
        if (!Files.exists(path)) {
            LOGGER.warn("The {} file does not exist. The --resume / -r feature will not work.", path);
            return properties;
        }

        try (Reader reader = Files.newBufferedReader(path)) {
            properties.load(reader);
        } catch (IOException e) {

{* ../../docs_src/openapi_callbacks/tutorial001_py310.py hl[1,23] *}

### Crea la *path operation* del callback { #create-the-callback-path-operation }

Para crear la *path operation* del callback usa el mismo `APIRouter` que creaste arriba.

Debería verse como una *path operation* normal de FastAPI:

		{"http://server/path?location", Endpoint{}, -1, fmt.Errorf("invalid URL endpoint format")},
		{"http://:/path", Endpoint{}, -1, fmt.Errorf("invalid URL endpoint format: invalid port number")},
		{"http://:8080/path", Endpoint{}, -1, fmt.Errorf("invalid URL endpoint format: empty host name")},
		{"http://server:/path", Endpoint{}, -1, fmt.Errorf("invalid URL endpoint format: invalid port number")},

        // Implementation uses dir.getPath() to check if file should be in that path
        SmbFilenameFilter filter = (dir, name) -> {
            if (dir == null)
                return false;
            String path = dir.getPath();
            // Accept files in /share/folder/ that are text files
            return path.equals("/share/folder/") && name != null && name.endsWith(".txt");
        };

func getFileInfoVersions(xlMetaBuf []byte, volume, path string, inclFreeVersions bool) (FileInfoVersions, error) {
	fivs, err := getAllFileInfoVersions(xlMetaBuf, volume, path, true)
	if err != nil {
		return fivs, err
	}

	// If inclFreeVersions is false, partition the versions in fivs.Versions
	// such that finally fivs.Versions has

                    + proximity + ",ttl=" + ttl + ",pathOffset=" + pathOffset + ",altPathOffset=" + altPathOffset + ",nodeOffset="
                    + nodeOffset + ",path=" + path + ",altPath=" + altPath + ",node=" + node + "]");
        }
    }

    int pathConsumed;
    int numReferrals;
    int flags;
    Referral[] referrals;

    Trans2GetDfsReferralResponse() {

    @Nonnull
    default Path findMandatoryRoot(Path basedir) {
        Path rootDirectory = findRoot(basedir);
        if (rootDirectory == null) {
            throw new IllegalStateException(getNoRootMessage());
        }
        return rootDirectory;
    }

    @Nullable
    default Path findRoot(Path basedir) {
        Path rootDirectory = basedir;

	return nil
}

func getValidPath(path string) (string, error) {
	if path == "" {
		return path, errInvalidArgument
	}

	var err error
	// Disallow relative paths, figure out absolute paths.
	path, err = filepath.Abs(path)
	if err != nil {
		return path, err
	}

	fi, err := Lstat(path)
	if err != nil && !osIsNotExist(err) {
		return path, err
	}
	if osIsNotExist(err) {

            // expected failure: wrong relative path calculation
            assertTrue(
                    afe.getMessage()
                            .contains(
                                    "Expected text value 'http://www.apache.org/path/to/parent/child-artifact-id/' but was "
                                            + "'http://www.apache.org/path/to/parent/../child-artifact-id/'"),

	ReadFile(ctx context.Context, volume string, path string, offset int64, buf []byte, verifier *BitrotVerifier) (n int64, err error)
	AppendFile(ctx context.Context, volume string, path string, buf []byte) (err error)
	CreateFile(ctx context.Context, origvolume, olume, path string, size int64, reader io.Reader) error
	ReadFileStream(ctx context.Context, volume, path string, offset, length int64) (io.ReadCloser, error)