title: Django ModelAdmin response_change method
body: <p>I've found that the response_change method on admin.ModelAdmin to be very useful -- yet I don't believe it is documented in the Django docs at <a href="https://docs.djangoproject.com/en/1.4/ref/contrib/admin/#modeladmin-methods" rel="nofollow">https://docs.djangoproject.com/en/1.4/ref/contrib/admin/#modeladmin-methods</a>.  Is the source code the only location for details?  If so, where is it?  I looked here: <a href="https://github.com/django/django/tree/master/django/contrib/admin" rel="nofollow">https://github.com/django/django/tree/master/django/contrib/admin</a> but did not find anything...</p>
  
  <p>An example of its effective use is here: <a href="http://brandonkonkle.com/blog/2010/oct/4/django-admin-customization-examples/" rel="nofollow">http://brandonkonkle.com/blog/2010/oct/4/django-admin-customization-examples/</a>.</p>
  
  <p>Thanks!</p>