code: function(setname, cb){
        client.smembers(setname, function(e,d){
          if(e) return console.error(e)
          console.log("\nPrinting set members for set %s", setname)
          console.dir(d)
          cb && cb(e,d)
        })
      }
docs: logs the members of the set setname is the name of the set (string)