How to use

removeAllListeners

function

in

Request

var cb = function (err, data) {
    TaskId && self.off('inner-kill-task', killTask);
    if (hasReturned) return;
    hasReturned = true;
    var attrs = {};
    retResponse && retResponse.statusCode && (attrs.statusCode = retResponse.statusCode);
    retResponse && retResponse.headers && (attrs.headers = retResponse.headers);
    if (err) {
      err = util.extend(err || {}, attrs);
      callback(err, null);
    } else {
      data = util.extend(data || {}, attrs);
      callback(null, data);
    }
    if (sender) {
      sender.removeAllListeners && sender.removeAllListeners();
      sender = null;
    }
  }