def get_classes_names(self, update=False):
if self.classes_names == None or update:<EOL><INDENT>self.classes_names = [i.get_name() for i in self.classes.class_def]<EOL><DEDENT>return self.classes_names<EOL>
Return the names of classes

:param update: True indicates to recompute the list.
               Maybe needed after using a MyClass.set_name().
:rtype: a list of string