expect:
        container.size == 1
        container.popConflict().toString() == "b:1,2"
    }

    def "contains multiple conflicting elements"() {
        container.newElement("a", [1, 2], null)
        container.newElement("b", [3, 4], null)
        expect:
        container.size == 2
        container.popConflict().toString() == "a:1,2"
        container.popConflict().toString() == "b:3,4"
    }

    @Override
    public void resolveNextConflict(Action<ConflictResolutionResult> resolutionAction) {
        assert hasConflicts();
        ConflictContainer<ModuleIdentifier, ComponentState>.Conflict conflict = conflicts.popConflict();
        ConflictResolverDetails<ComponentState> details = new DefaultConflictResolverDetails<>(conflict.candidates);
        resolver.select(details);
        if (details.hasFailure()) {

        return registerConflict(singletonList(target), replacedBy);
    }

    public int getSize() {
        return conflicts.size();
    }

    public Conflict popConflict() {
        assert !conflicts.isEmpty();
        Conflict conflict = conflicts.pop();
        for (K participant : conflict.participants) {
            conflictsByParticipant.remove(participant);
        }