docs: def elements_exist(elem_to_parse, element_paths=None, all_exist=False):
      """
      :return: true if any of the named elements exist in the parent by default,
      unless all_exist is true, in which case all the named elements must exist
      """
  
      element = get_element(elem_to_parse)
  
      if element is None:
          return False
  
      if not element_paths or isinstance(element_paths, string_types):
          return element_exists(element, element_paths)
  
      exists = False
  
      for element_path in element_paths:
          exists = element_exists(element, element_path)
  
          if all_exist and not exists:
              return False
  
          if exists and not all_exist:
              return True
  
      return exists