    # File lib/active_support/memoizable.rb, line 21
          def memoize_all
            methods.each do |m|
              if m.to_s =~ /^_unmemoized_(.*)/
                if method(m).arity == 0
                  __send__($1)
                else
                  ivar = MEMOIZED_IVAR.call($1)
                  instance_variable_set(ivar, {})
                end
              end
            end
          end