# File lib/groupdate/series.rb, line 12
    def method_missing(method, *args, &block)
      if @calculations.include?(method)
        magic.perform(relation, method, *args, &block)
      elsif relation.respond_to?(method, true)
        Groupdate::Series.new(magic, relation.send(method, *args, &block))
      else
        super
      end
    end