apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/component/PermissionValidator.java/PermissionValidator/hasCreateAppNamespacePermission
class PermissionValidator:  public boolean hasCreateAppNamespacePermission(String appId, AppNamespace appNamespace) {

    boolean isPublicAppNamespace = appNamespace.isPublic();

    if (portalConfig.canAppAdminCreatePrivateNamespace() || isPublicAppNamespace) {
      return hasCreateNamespacePermission(appId);
    }

    return isSuperAdmin();
  }