Callback function after tooltip / popover is created with twitter bootstrap?

Works for tooltip:

var tmp = $.fn.tooltip.Constructor.prototype.show;
$.fn.tooltip.Constructor.prototype.show = function () {
  tmp.call(this);
  if (this.options.callback) {
    this.options.callback();
  }
}

this.$('#selector').tooltip({ 
  placement: 'top', 
  callback: function() { 
    alert('hello') 
  } 
});