code: def match_future_child(self, parent, relation, recursive=False):
          
  
          match = False
          children = self.get_descendants if recursive else self.get_children
          for child in children(parent, no_iframe=self.iframe_restrict):
              match = self.match_selectors(child, relation)
              if match:
                  break
          return match
docs: Match future child.