docstr: Explicit wait until an element is NOT found. timeout defaults to
  the fixture's `wait_timeout`.
code: def wait_for_no_elements(self, selector, timeout=None):
      """Explicit wait until an element is NOT found. timeout defaults to
      the fixture's `wait_timeout`."""
      until(
          # if we use get_elements it waits a long time to see if they appear
          # so this one calls out directly to execute_script
          lambda: self.driver.execute_script(
              f"return document.querySelectorAll('{selector}').length"
          )
          == 0,
          timeout or self._wait_timeout,
      )
  
imports: import os
  import sys
  import time
  import logging
  import warnings
  import percy
  import requests
  from selenium import webdriver
  from selenium.webdriver.support import expected_conditions
  from selenium.webdriver.common.by import By
  from selenium.webdriver.support.wait import WebDriverWait
  from selenium.webdriver.common.keys import Keys
  from selenium.webdriver.common.action_chains import ActionChains
  from selenium.common.exceptions import WebDriverException, TimeoutException, MoveTargetOutOfBoundsException
  from dash.testing.wait import text_to_equal, style_to_equal, class_to_equal, contains_text, contains_class, until
  from dash.testing.dash_page import DashPageMixin
  from dash.testing.errors import DashAppLoadingError, BrowserError, TestingTimeoutError
  from dash.testing.consts import SELENIUM_GRID_DEFAULT
label_desc: Use image node_id 13 for calling the Browser obj's underlying member method code with example usage: obj.wait_for_no_elements(selector, timeout) without return types