import java.io.File;
import java.util.LinkedHashSet;
import java.util.Set;

public class SubtractingFileCollection extends AbstractOpaqueFileCollection {
    private final AbstractFileCollection left;
    private final FileCollection right;

    public SubtractingFileCollection(AbstractFileCollection left, FileCollection right) {
        super(left.taskDependencyFactory, left.patternSetFactory);

import org.gradle.api.internal.file.FileCollectionStructureVisitor
import org.gradle.api.internal.file.FileTreeInternal
import org.gradle.api.internal.file.FilteredFileCollection
import org.gradle.api.internal.file.SubtractingFileCollection
import org.gradle.api.internal.file.collections.FailingFileCollection
import org.gradle.api.internal.file.collections.FileSystemMirroringFileTree
import org.gradle.api.internal.file.collections.ProviderBackedFileCollection

            }
            return builder.build();
        }
    }

    @Override
    public FileCollection minus(final FileCollection collection) {
        return new SubtractingFileCollection(this, collection);
    }

    @Override
    public void addToAntBuilder(Object builder, String nodeName, AntType type) {
        if (type == AntType.ResourceCollection) {