docs: def load_modes(node):
      """Load all observing modes"""
      if isinstance(node, list):
          values = [load_mode(child) for child in node]
          keys = [mode.key for mode in values]
          return dict(zip(keys,values))
      elif isinstance(node, dict):
          values = {key: load_mode(child) for key, child in node}
          return values
      else:
          raise NotImplementedError