@property<EOL><INDENT>def loaded(self):<DEDENT>
return True<EOL>
Loaded state of the page region.

        You may need to initialise your page region before it's ready for you
        to interact with it. If this is the case, you can override
        :py:attr:`loaded` to return ``True`` when the region has finished
        loading.

        :return: ``True`` if page is loaded, else ``False``.
        :rtype: bool

        Usage (Selenium)::

          from pypom import Page, Region
          from selenium.webdriver.common.by import By

          class Mozilla(Page):
              URL_TEMPLATE = 'https://www.mozilla.org/'

              @property
              def newsletter(self):
                  return Newsletter(self)

              class Newsletter(Region):
                  _root_locator = (By.ID, 'newsletter-form')

                  @property
                  def loaded(self):
                      return 'loaded' in self.root.get_attribute('class')

        Usage (Splinter)::

          from pypom import Page, Region

          class Mozilla(Page):
              URL_TEMPLATE = 'https://www.mozilla.org/'

              @property
              def newsletter(self):
                  return Newsletter(self)

              class Newsletter(Region):
                  _root_locator = ('id', 'newsletter-form')

                  @property
                  def loaded(self):
                      return 'loaded' in self.root['class']