var XFile = uu.klass.generic();
    XFile.prototype = {
      construct: function(agent) {
        this.agent = agent;
      },
      msgbox: function(msg, p1, p2) {
        uu.log("%s say, I accepted a message [%s], from %s", this.agent, msg, p1.from);
      }
    };
    var agent1 = new XFile("Agent Mulder");
    var agent2 = new XFile("Agent Scully");
    var agent3 = new XFile("Smoking Man");

    uu.msg.post(agent1, "Hello Mulder", { from: "Scully"      }); // スカリーからモルダーにご挨拶
    uu.msg.post(0,      "Hi All",       { from: "Mulder"      }); // モルダーが(自分も含め)みんなにご挨拶
    uu.msg.send(agent1, "...",          { from: "Smoking Man" }); // スモーキングマンがモルダーだけにお返事
    uu.msg.post([agent2, agent3], "Samantha was abducted",
                                        { from: "Mulder"      }); // モルダーが(自分以外の人に)いつものご乱心