docs: def generate_id(self, element):
          """
          Generate a id for a element.
  
          :param element: The element.
          :type element: hatemile.util.html.HTMLDOMElement
          """
  
          if not element.has_attribute('id'):
              element.set_attribute('id', self.prefix_id + str(self.count))
              self.count = self.count + 1