File backingFile
        final String displayName = "<display>"

        TestArchiveFileTree(DecompressionCoordinator decompressionCache, File backingFile) {
            super(decompressionCache)
            this.backingFile = backingFile
        }

        @Override
        DirectoryFileTree getMirror() {
            throw new UnsupportedOperationException()
        }

        }
    }

    class TestResource {
        final TestFile backingFile
        private final Closure onChange

        TestResource(TestFile backingFile, Closure onChange = {}) {
            this.backingFile = backingFile
            this.onChange = onChange
        }

        void replaceContents(String contents) {
            backingFile.withWriter { w ->
                w << contents
            }

        return getBackingFileProvider().get();
    }

    @Override
    public void visitStructure(MinimalFileTreeStructureVisitor visitor, FileTreeInternal owner) {
        File backingFile = getBackingFile();
        visitor.visitFileTreeBackedByFile(backingFile, owner, this);
    }

    @Override
    public void visitDependencies(TaskDependencyResolveContext context) {
        context.add(getBackingFileProvider());
    }

	if err != nil {
		return "", fmt.Errorf("failed to list loop devices in sysfs: %s", err)
	}

	for _, device := range devices {
		backingFile := fmt.Sprintf("%s/loop/backing_file", device)

		// The contents of this file is the absolute path of "path".
		data, err := os.ReadFile(backingFile)
		if err != nil {
			continue
		}

		// Return the first match.
		backingFilePath := cleanBackingFilePath(string(data))