code: def child_elements(self, by=By.ID, value=None, el_class=None):
          
          el, selector = define_selector(by, value, el_class)
          return self._init_element(elements.PageElementsList(selector, el))
docs: alias for ``find_elements``
          :param by:
          :param value:
          :param el_class:
          :return: