@Override
 public AttributeDefinition getAttributeDefinition() {
   AttributeDefinition attr = new AttributeDefinition();
   attr.setNamespace(AttributesManager.NS_ENTITYLESS_ATTR_DEF);
   attr.setFriendlyName("namespace_maxGID");
   attr.setDisplayName("Max GID in namespace");
   attr.setType(Integer.class.getName());
   attr.setDescription("Maximal value of Group ID.");
   return attr;
 }
 @Override
 public AttributeDefinition getAttributeDefinition() {
   AttributeDefinition attr = new AttributeDefinition();
   attr.setNamespace(AttributesManager.NS_RESOURCE_ATTR_DEF);
   attr.setFriendlyName("defaultDataQuotas");
   attr.setDisplayName("Default data quotas on any volumes.");
   attr.setType(LinkedHashMap.class.getName());
   attr.setDescription(
       "Every record is the path (to volume) and the quota in format 'SoftQuota:HardQuota' in (M, G, T, ...), G is default. Example: '10G:20T'.");
   return attr;
 }
 @Override
 public AttributeDefinition getAttributeDefinition() {
   AttributeDefinition attr = new AttributeDefinition();
   attr.setNamespace(AttributesManager.NS_FACILITY_ATTR_DEF);
   attr.setFriendlyName("ldapBaseDN");
   attr.setDisplayName("LDAP base DN");
   attr.setType(String.class.getName());
   attr.setDescription(
       "Base part of DN, which will be used for all entities propagated to facility. Should be like \"ou=sth,dc=example,dc=domain\" (without quotes)");
   return attr;
 }