input: from selenium import webdriver
  
  def retrieve_product_names(url: str) -> List[str]:
      """
      This function initializes a Selenium webdriver, navigates to the specified URL,
      searches for a keyword ("shoes"), and retrieves the names of products from
      search results. Returns the list of product names.
  
      >>> retrieve_product_names("https://www.example.com/")
      ['Running Shoe', 'Casual Sneaker', 'High Heel']
      """
      
      # create a new Firefox session
      driver = webdriver.Firefox()
      driver.implicitly_wait(30)
      driver.maximize_window()
  
      # navigate to the application home page
      driver.get(url)
  
      # get the search textbox
      search_field = driver.find_element_by_name("q")
      search_field.clear()
  
      # enter search keyword and submit
      search_field.send_keys("shoes")
      search_field.submit()
  
      # get the list of elements which are displayed after the search
      # currently on result page using find_elements_by_class_name
      product_list = driver.find_elements_by_class_name("product")
  
      # create a list to hold the names of the products
      product_names = []
  
      # iterate through each element and append the text (name of the product) to the list
      for product in product_list:
          product_names.append(product.text)
  
      # close the browser window
      driver.quit()
  
      return product_names
output:     # create a list to hold the names of the products
      product_names = []
  
      # iterate through each element and append the text (name of the product) to the list
      for product in product_list:
          product_names.append(product.text)
  
      # close the browser window
      driver.quit()
  
      return product_names