title: SpringLayout with SwingBuilder
body: <p>I am trying to quickly and easily layout rows and columns of buttons and labels.  Having buttons and labels be the same width looks ridiculous, so I have ruled out <code>GridLayout</code>.  I may slit my wrists if someone suggests <code>GridBagLayout</code>.  SO I was thinking <code>SpringLayout</code> was my best option.  But I am not a Groovy expert, and that is especially true of GUI stuff.</p>
  
  <p>So I was hoping someone could provide or point to a simple example of using SpringLayout with <code>SwingBuilder</code>.  In particular, how to specify constraints, since in all of the SwingBuilder examples I see, each widget instance gets created on the fly without a named instance.  So how would I reference another sibling or parent widget for relative constraints?  I have not found anything on the internet that can explain this.</p>
  
  <p>Working example code would with 2 rows/2 columns would get the win!</p>