}
                }
            }

            @Override
            public void visitFileTree(File root, PatternSet patterns, FileTreeInternal fileTree) {
                visitor.visitFileTree(root, patterns, fileTree);
            }

            @Override

                files.addAll(fileTree.getFiles());
            }

            @Override
            public void visitFileTree(File root, PatternSet patterns, FileTreeInternal fileTree) {
                addTreeContents(fileTree);
            }

            @Override

            }
        }

        override fun visitCollection(source: FileCollectionInternal.Source, contents: Iterable<File>) =
            throw UnsupportedOperationException()

        override fun visitFileTree(root: File, patterns: PatternSet, fileTree: FileTreeInternal) {
            roots.add(DirectoryTreeSpec(root, patterns))
        }

        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) {
        visitFrom(visitor, dir, RelativePath.EMPTY_ROOT, new AtomicBoolean());
    }

    /**

private
class ResolutionBackedFileCollectionSpec(val displayName: String, val lenient: Boolean, val elements: List<Any>)


private
abstract class AbstractVisitor : FileCollectionStructureVisitor {
    override fun visitFileTree(root: File, patterns: PatternSet, fileTree: FileTreeInternal) =
        unsupportedFileTree(fileTree)

                    contents.forEach(location -> taskInputs.add(location.getAbsolutePath()));
                }

                @Override
                public void visitFileTree(File root, PatternSet patterns, FileTreeInternal fileTree) {
                    if (patterns.isEmpty()) {
                        taskInputs.add(root.getAbsolutePath());
                    } else {

            }

            @Override
            public void visitCollection(Source source, Iterable<File> contents) {
            }

            @Override
            public void visitFileTree(File root, PatternSet patterns, FileTreeInternal fileTree) {
            }

            @Override

        override fun visitCollection(source: FileCollectionInternal.Source, contents: Iterable<File>) {
            elements.addAll(contents)
        }

        override fun visitFileTree(root: File, patterns: PatternSet, fileTree: FileTreeInternal) {
            elements.add(directoryFileTreeFactory.create(root, patterns))
        }