如何将socket.io的事件处理程序(在nodejs中)绑定到我自己的作用域？

io.on('connection', (socket) => {
  socket.on('myEvent', (data) => {
    console.log(data);
  });
});

io.on('connection', function(socket) {
  socket.on('myEvent', function(data) {
    console.log(data);
  }.bind(this));
}.bind(this));

io.on('connection', function(socket) {
  var that = this;
  socket.on('myEvent', function(data) {
    console.log(data);
  });
});