Parent parent = m.getParent();
        if (parent != null) {
            validateStringNotEmpty(
                    "parent.groupId", problems, Severity.FATAL, Version.BASE, parent.getGroupId(), parent);

            validateStringNotEmpty(
                    "parent.artifactId", problems, Severity.FATAL, Version.BASE, parent.getArtifactId(), parent);

                                    + ", using it for other repositories will corrupt your repository metadata.");
                }

                validateStringNotEmpty(problems, "mirrors.mirror.url", mirror.getUrl(), mirror.getId());

                validateStringNotEmpty(problems, "mirrors.mirror.mirrorOf", mirror.getMirrorOf(), mirror.getId());
            }
        }

        List<Profile> profiles = settings.getProfiles();