Dojo abstracts alot from you when creating widgets.  So how do you see the real source?  The source is important when testing certain types of requirements.  Accessibility is one of those requirements.
Normal code
As an example, I wrote a simple line of code to display a Dojo widget for currency.
<input type=”text” id=”amount” name=”amt” dojoType=”dijit.form.CurrencyTextBox” constraints=”{fractional:true}” currency=”USD” [...]