# File rss/maker/atom.rb, line 84
def to_feed(feed, current)
category = feed.class::Category.new
set = setup_values(category)
if set
current.categories << category
set_parent(category, current)
setup_other_elements(feed)
else
raise NotSetError.new(self.class.not_set_name,
not_set_required_variables)
end
end