title: Update Field definition in Spring Roo
body: <p>I defined a field in Roo with:</p>
  
  <pre><code>field number --fieldName firstNum --type java.lang.Integer
  </code></pre>
  
  <p>But I really wanted to define it with --notNull.</p>
  
  <p>Can I update this in Roo, or do I have to update the generated files manually outside of the Roo console?</p>