Inheritance: extends definedClassC
 function x()
 {
     parent::undefinedMethod();
     parent::definedPrivateMethod();
     parent::definedPublicMethod();
     parent::definedProtectedMethod();
 }
 public function x()
 {
     parent::someBMethodInSilex();
 }
 function x()
 {
     parent::undefinedMethod();
     parent::definedMethod();
 }