# File lib/familia/object.rb, line 265
    def exists? idx, suffix=:object
      return false if idx.to_s.empty?
      objkey = rediskey idx, suffix
      ret = Familia.redis(self.uri).exists objkey
      Familia.trace :EXISTS, Familia.redis(self.uri), "#{rediskey(idx, suffix)} #{ret}", caller if Familia.debug?
      ret
    end