docs: def nodes(self, alias, depth=10, bank_id=None):
          """
          URL for getting bulk nodes in hierarchy
          :param alias:
          :param depth:
          :return:
          """
          if bank_id:
              return self._root + self._safe_alias(alias) + '/child/nodes/' + bank_id + '?descendentlevels=' + str(depth)
          else:
              return self._root + self._safe_alias(alias) + '/root/nodes?descendentlevels=' + str(depth)