title: List of instance methods of current class only
body: <p>I have an instance <code>o</code> of class <code>O</code>. I'd like to know what <code>o</code> is capable of.</p>
  
  <p><code>o.methods</code> will give me many methods. So I usually do <code>o.methods - Object.instance_methods</code>. But that is not concise.</p>
  
  <p>I want to do something like <code>o.methods - o.class.superclass.instance_methods</code>. That is, just the methods defined in <code>O</code> itself.</p>
  
  <p>Is there some other way?</p>