how to tell different modes in gwt 2.0

Anyone know how to tell what mode an GWT 2.0 app is currently running at?

The idea is that i could do something like:

if(GWT.wha开发者_如何转开发tIsYourmode() == 'dev')
  //run some code
else
  //run some different code

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I think what you're looking for is GWT.isClient(), GWT.isProdMode() or GWT.isScript(). You can find the Javadoc here.