method_missing (Markaby::Builder)

    # File lib/markaby/builder.rb, line 177
        def method_missing(sym, *args, &block)
          if @helpers.respond_to?(sym, true) && !self.class.ignored_helpers.include?(sym)
            r = @helpers.send(sym, *args, &block)
            if @output_helpers and r.respond_to? :to_str
              fragment { @builder << r }
            else
              r
            end
          elsif ::Builder::XmlMarkup.instance_methods.include?(sym.to_s)
            @builder.__send__(sym, *args, &block)
          elsif instance_variables.include?("@#{sym}")
            instance_variable_get("@#{sym}")
          elsif @tagset.nil?
            tag!(sym, *args, &block)
          else
            raise NoMethodError, "no such method `#{sym}'"
          end
        end