docs: def absolute_name(self, depth=0):
          """
          Return the absolute name of the node.
  
          Concatenate names from root to self within depth.
  
          Args:
              depth (int): maximum depth to go to.
  
          Returns:
              str: absolute name of the node (until given depth is reached).
          """
          node, node_depth = self, self.depth
          if depth < 1:
              depth = node_depth
          while node_depth > depth and node.package is not None:
              node = node.package
              node_depth -= 1
          names = []
          while node is not None:
              names.append(node.name)
              node = node.package
          return '.'.join(reversed(names))