* It shouldn't be too slow, or the whole chain will pay the price.
 */
public class NormalizingExcludeFactory extends DelegatingExcludeFactory {
    private final Intersections intersections;
    private final Unions unions;

    public NormalizingExcludeFactory(ExcludeFactory delegate) {
        super(delegate);
        this.intersections = new Intersections(this);

import org.gradle.api.internal.artifacts.ivyservice.resolveengine.excludes.factories.LoggingExcludeFactory;
import org.gradle.api.internal.artifacts.ivyservice.resolveengine.excludes.factories.NormalizingExcludeFactory;
import org.gradle.api.internal.artifacts.ivyservice.resolveengine.excludes.factories.OptimizingExcludeFactory;
import org.gradle.api.internal.artifacts.ivyservice.resolveengine.excludes.simple.DefaultExcludeFactory;

        size >WORDS.size() ? "word${size}" : WORDS[size]
    }

    /**
     * Converts an operation dumped as JSON into code which can be used to
     * check the result, to be used in {@link NormalizingExcludeFactory}
     *
     * @param json
     * @return
     */
    String toCode(String json) {
        def slurper = new JsonSlurper().parse(json.trim().getBytes("utf-8"))
        toCodeFromSlurpedJson(slurper)

    }

    def "intersection of #one with #other = #expected using normalizing factory"() {
        given:
        factory = new NormalizingExcludeFactory(factory)

        expect:
        factory.allOf(one, other) == expected
        factory.allOf(other, one) == expected

        where:

import spock.lang.Shared
import spock.lang.Specification
import spock.lang.Unroll

class NormalizingExcludeFactoryTest extends Specification implements ExcludeTestSupport {

    def setup() {
        factory = new NormalizingExcludeFactory(factory)
    }

    @Shared
    private DefaultIvyArtifactName artifactName = new DefaultIvyArtifactName("a", "b", "c")

    @Unroll("#left ∪ #right = #expected")
    def "union of two elements"() {

Class <org.gradle.api.internal.artifacts.ivyservice.resolveengine.excludes.factories.NormalizingExcludeFactory$UnionOf> is not annotated (directly or via its package) with @org.gradle.api.NonNullApi in (NormalizingExcludeFactory.java:0)