def find_element_by_css_selector(self, css_selector):
        return self.find_element(by=By.CSS_SELECTOR, value=css_selector)
return the size of the underlying bson object
dataset/ETHPy150Open apiad/sublime-browser-integration/selenium/webdriver/remote/webelement.py/WebElement.find_element_by_css_selector--crossover with--dataset/ETHPy150Open namlook/mongokit/mongokit/document.py/Document.get_size