not_between

# File activerecord/lib/arel/predications.rb, line 84
    def not_between(other)
      if unboundable?(other.begin) == 1 || unboundable?(other.end) == -1
        not_in([])
      elsif open_ended?(other.begin)
        if open_ended?(other.end)
          if infinity?(other.begin) == 1 || infinity?(other.end) == -1
            not_in([])
          else
            self.in([])
          end
        elsif other.exclude_end?
          gteq(other.end)
        else
          gt(other.end)
        end
      elsif open_ended?(other.end)
        lt(other.begin)
      else
        left = lt(other.begin)
        right = if other.exclude_end?
          gteq(other.end)
        else
          gt(other.end)
        end
        left.or(right)
      end
    end