code: def store_new(self, coll, path, mtime):
          
          obj = load_yaml_config(path)
          self.cache[coll] = (mtime, obj)
          return obj
docs: Load a collections metadata file and store it
  
          :param str coll: The name of the collection the metadata is for
          :param str path: The path to the collections metadata file
          :param float mtime: The current mtime of the collections metadata file
          :return: The collections metadata
          :rtype: dict