+ ->addDefaultsIfNotSet()
+ ->ignoreExtraKeys()
+ ->children()
+ ->scalarNode('civility')->cannotBeEmpty()->defaultValue($defaults['class']['civility'])->end()
+ ->scalarNode('group')->cannotBeEmpty()->defaultValue($defaults['class']['group'])->end()
+ ->scalarNode('user')->cannotBeEmpty()->defaultValue($defaults['class']['user'])->end()
+ ->end()