class Selenium::WebDriver::Remote::Bridge::LocatorConverter

def escape_css(string)
  string = string.gsub(ESCAPE_CSS_REGEXP) { |match| "\\#{match}" }
  string = "\\#{UNICODE_CODE_POINT + Integer(string[0])} #{string[1..]}" if string[0]&.match?(/[[:digit:]]/)
  string
end