title: Calling a method from inside of another class
body: <p>I have a node class like this:</p>
  
  <pre><code>var Classes = function () {
  };
  
  Classes.prototype.methodOne = function () {
      //do something
  };
  </code></pre>
  
  <p>when i want to call <code>methodOne</code>, i use this:</p>
  
  <pre><code>this. methodOne();
  </code></pre>
  
  <p>And it works. But right now i have to call it from inside of another method of another class. This time its not works and cant access to <code>methodOne</code> :</p>
  
  <pre><code>var mongoose = new Mongoose();
  mongoose.save(function (err, coll) {
    //save to database
    this. methodOne(); //this does not work
  }
  </code></pre>
  
  <p>how i can call methodOne? i use <code>Classes.methodOne()</code> but it's not work</p>