title: How to know if an object is dynamic in AS3
body: <p>In Action Script 3, you can write a class that defines a dynamic object (MovieClip and Object are two examples), this objects can be modified in run-time. What I want to know if is there some way (in run-time, of course) to know if certain object is dynamic or not.</p>
  
  <p>PS: Without making something like this:</p>
  
  <pre><code>function isDynamic(object) {
      try {
          object.newProperty = 'someValue'
      } catch (e) {
          return false
      }
      return true
  }
  </code></pre>