def GetInvisibleSpecialPropertyNames():
 invisible_names = []
 for (name, value) in _SPECIAL_PROPERTY_MAP.items():
  (is_visible, _, _) = value
  if (not is_visible):
   invisible_names.append(name)
 return invisible_names

def GetInvisibleSpecialPropertyNames ( ) : invisible_names = [ ] for ( name , value ) in _SPECIAL_PROPERTY_MAP . items ( ) : ( is_visible , _ , _ ) = value if ( not is_visible ) : invisible_names . append ( name ) return invisible_names
gets the names of all non user-visible special properties .