If [Embed] doesn't find the asset, how can we skip?

programming flash
1

Hello guys

I’m embedding a font at runtime with flex, using the following syntax:

 
[Embed(source='./Regular.ttf', fontFamily="Arial", fontName="Arial", fontWeight="normal", mimeType='application/x-font')] 
  public var Regular:Class;

I want this to be optional such that if this TTF file unexists at the specified location, then it can just be skipped and Regular takes a value of null.

How can I achieve this?