code: def get_all(self, routes):
          
          for route in routes:
              self.load(route)
  
          return {name: value[1] for name, value in iteritems(self.cache)}
docs: Load the metadata for all routes (collections) and populate the cache
  
          :param list[str] routes: List of collection names
          :return: A dictionary containing each collections metadata
          :rtype: dict