# File lib/journey/nfa/builder.rb, line 50
      def terminal node
        from_i = @i += 1 # new state
        to_i   = @i += 1 # new state

        @tt[from_i, to_i] = node
        @tt.accepting = to_i
        @tt.add_memo to_i, node.memo

        [from_i, to_i]
      end