code: def get_plugs_mail_classes(self, app):
          
          classes = []
          members = self.get_members(app)
          for member in members:
              name, cls = member
              if inspect.isclass(cls) and issubclass(cls, PlugsMail) and name != 'PlugsMail':
                  files_ = self.get_template_files(app.__file__, name)
                  for file_ in files_:
                      try:
                          description = cls.description
                          location = file_
                          language = self.get_template_language(location)
                          classes.append((name, location, description, language))
                      except AttributeError:
                          raise AttributeError('Email class must specify email description.')
          return classes
docs: Returns a list of tuples, but it should
          return a list of dicts