code: def _merge_page(self, existing_page, fresh_page):
          '''
          Utility method for merging info from `brozzler.Page` instances
          representing the same url but with possibly different metadata.
          '''
          existing_page.priority += fresh_page.priority
          existing_page.hashtags = list(set(
              existing_page.hashtags + fresh_page.hashtags))
          existing_page.hops_off = min(
                  existing_page.hops_off, fresh_page.hops_offf _merge_page(self, existing_page, fresh_page):
          '''
          Utility method for merging info from `brozzler.Page` instances
          representing the same url but with possibly different metadata.
          '''
          existing_page.priority += fresh_page.priority
          existing_page.hashtags = list(set(
              existing_page.hashtags + fresh_page.hashtags))
          existing_page.hops_off = min(
                  existing_page.hops_off, fresh_page.hops_off)
docs: Utility method for merging info from `brozzler.Page` instances
          representing the same url but with possibly different metadata.