code: def render(self, node):
          
          lines = []
  
          children = self.traverse.get_children(node)
          lines.append(self.draw.node_label(self.traverse.get_text(node)))
  
          for n, child in enumerate(children):
              child_tree = self.render(child)
  
              if n == len(children) - 1:
                  # last child does not get the line drawn
                  lines.append(self.draw.last_child_head(child_tree.pop(0)))
                  lines.extend(self.draw.last_child_tail(l)
                               for l in child_tree)
              else:
                  lines.append(self.draw.child_head(child_tree.pop(0)))
                  lines.extend(self.draw.child_tail(l)
                               for l in child_tree)
  
          return lines
docs: Renders a node. This function is used internally, as it returns
          a list of lines. Use :func:`~asciitree.LeftAligned.__call__` instead.