code: def prune(self, address):
          '''
          Remove all children (and descendants) below ADDRESS.
  
          Arguments:
              address (str): the address to be pruned
          '''
  
          try:
              for step in self._walk_to_address(address):
                  node = step
          except AddressNotInTree:
              return
  
          node.children.clear(f prune(self, address):
          '''
          Remove all children (and descendants) below ADDRESS.
  
          Arguments:
              address (str): the address to be pruned
          '''
  
          try:
              for step in self._walk_to_address(address):
                  node = step
          except AddressNotInTree:
              return
  
          node.children.clear()
docs: Remove all children (and descendants) below ADDRESS.
  
          Arguments:
              address (str): the address to be pruned