def blogger_display_name
      return "" if blogger.blank?
      if blogger.respond_to?(Blogit.configuration.blogger_display_name_method)
        blogger.send(Blogit.configuration.blogger_display_name_method)
      else
        method_name = Blogit.configuration.blogger_display_name_method
        raise ConfigurationError, "#{blogger.class}##{method_name} is not defined"
      end
    end
def blogger_display_name
      return "" if blogger.blank?
      if blogger.respond_to?(Blogit.configuration.blogger_display_name_method)
        blogger.send(Blogit.configuration.blogger_display_name_method)
      else
        method_name = Blogit.configuration.blogger_display_name_method
        raise ConfigurationError, "#{blogger.class}##{method_name} is not defined"
      end
    end
The blogger who wrote this {Post Post's} display name

 Returns the blogger's display name as a String if it's set.
 Returns an empty String if blogger is not present.
 Raises a ConfigurationError if the method called is not defined on {#blogger}