ModelProblem problem = new org.apache.maven.internal.impl.model.DefaultModelProblem(
                                "Child module " + moduleFile + " of " + pomFile + " forms aggregation cycle " + buffer,
                                ModelProblem.Severity.ERROR,
                                ModelProblem.Version.BASE,
                                model,
                                -1,

            if (parentData == null) {
                currentData = superData;
            } else if (!parentIds.add(parentData.id())) {
                StringBuilder message = new StringBuilder("The parents form a cycle: ");
                for (String parentId : parentIds) {
                    message.append(parentId).append(" -> ");
                }
                message.append(parentData.id());