import org.gradle.api.internal.file.FileCollectionBackedFileTree
import org.gradle.api.internal.file.FileCollectionFactory
import org.gradle.api.internal.file.FileCollectionInternal
import org.gradle.api.internal.file.FileCollectionStructureVisitor
import org.gradle.api.internal.file.FileOperations
import org.gradle.api.internal.file.FileTreeInternal
import org.gradle.api.internal.file.FilteredFileTree
import org.gradle.api.internal.file.archive.TarFileTree

     */
    @Override
    public final Iterator<File> iterator() {
        return getIntrinsicFiles().iterator();
    }

    @Override
    protected void visitContents(FileCollectionStructureVisitor visitor) {
        visitor.visitCollection(OTHER, this);
    }

    abstract protected Set<File> getIntrinsicFiles();

        return this;
    }

    @Override
    public void visitContentsAsFileTrees(Consumer<FileTreeInternal> visitor) {
    }

    @Override
    protected void visitContents(FileCollectionStructureVisitor visitor) {
    }

        return displayName;
    }

    @Override
    public Set<File> getFiles() {
        return ImmutableSet.of();
    }

    @Override
    protected void visitContents(FileCollectionStructureVisitor visitor) {
    }

    @Override
    public FileTreeInternal getAsFileTree() {
        return new EmptyFileTree(FileTreeInternal.DEFAULT_TREE_DISPLAY_NAME);
    }

    @Override

        visitChildren(builder::add);
        return builder.build();
    }

    @Override
    protected void visitContents(FileCollectionStructureVisitor visitor) {
        visitChildren(child -> child.visitStructure(visitor));
    }