abstract protected Provider<File> getBackingFileProvider();

    private File getBackingFile() {
        return getBackingFileProvider().get();
    }

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

    @Override

    def "visits structure when backing file is known"() {
        def owner = Stub(FileTreeInternal)
        def visitor = Mock(MinimalFileTree.MinimalFileTreeStructureVisitor)
        def backingFile = tmpDir.createFile("thing.bin")

        def fileTree = new TestArchiveFileTree(TestDecompressionCoordinators.decompressionCoordinator(tmpDir.createDir("cache-dir")), backingFile)

    @Override
    public boolean contains(File file) {
        return DirectoryTrees.contains(fileSystem, this, file) && file.isFile();
    }

    @Override
    public void visitStructure(MinimalFileTreeStructureVisitor visitor, FileTreeInternal owner) {
        visitor.visitFileTree(dir, patternSet, owner);
    }

    @Override
    public void visit(FileVisitor visitor) {