code: def get_plugins_by_name(self, *names):
          
          self._import_plugins()
          plugin_instances = []
          for name in names:
              if isinstance(name, six.string_types):
                  try:
                      plugin_instances.append(self.plugins[name.lower()])
                  except KeyError:
                      raise PluginNotFound("No plugin named '{0}'.".format(name))
              elif isinstance(name, type) and issubclass(name, ContentPlugin):
                  # Will also allow classes instead of strings.
                  plugin_instances.append(self.plugins[self._name_for_model[name.model]])
              else:
                  raise TypeError("get_plugins_by_name() expects a plugin name or class, not: {0}".format(name))
          return plugin_instances
docs: Return a list of plugins by plugin class, or name.