[デバッグ用]Function.prototype.bind を修正して source プロパティに元関数を仕込む

debuggableBind.js

/**
 * debaggable bind
 * set the original function to 'source' property on bind()
 */

(function(){
  var bind = Function.prototype.bind;
  Function.prototype.bind = function () {
    var bound = bind.apply(this, arguments);
    bound.source = this.source || this;
    return bound;
  }
}());