import java.util.Set;

public class StrictVersionConstraints {

    public static final StrictVersionConstraints EMPTY = new StrictVersionConstraints() {
        @Override
        public final StrictVersionConstraints union(StrictVersionConstraints other) {
            return other;
        }

        @Override
        public final StrictVersionConstraints intersect(StrictVersionConstraints other) {
            return EMPTY;
        }

        childNode.collectAncestorsStrictVersions([edge1, edge2])

        then:
        childNode.ancestorsStrictVersionConstraints == StrictVersionConstraints.EMPTY
        parent1.ownStrictVersionConstraints != StrictVersionConstraints.EMPTY
        parent2.ownStrictVersionConstraints == StrictVersionConstraints.EMPTY
    }

    def "computes intersection of ancestors"() {
        when:
        def parent1Edge = edge(root, false)

            .union(parentEndorsedStrictVersionConstraints);
    }

    private static StrictVersionConstraints notNull(@Nullable StrictVersionConstraints strictVersionConstraints) {
        return strictVersionConstraints == null ? StrictVersionConstraints.EMPTY : strictVersionConstraints;
    }

    private StrictVersionConstraints getEndorsedStrictVersions(EdgeState incomingEdge) {

Class <org.gradle.api.internal.artifacts.ivyservice.resolveengine.strict.StrictVersionConstraints$1> is not annotated (directly or via its package) with @org.gradle.api.NonNullApi in (StrictVersionConstraints.java:0)
Class <org.gradle.api.internal.artifacts.ivyservice.resolveengine.strict.StrictVersionConstraints> is not annotated (directly or via its package) with @org.gradle.api.NonNullApi in (StrictVersionConstraints.java:0)