Extension of Ant's built-in <fail> task that
    can throw an exception that is given by a reference.  This may be
    useful if you want to rethrow the exception that has been caught
    by a <trycatch> task in the
    <catch> block.
| Attribute | Description | Required | 
|---|---|---|
| refid | Id of the referenced exception. | No. | 
In addition, all attributes of the <fail>
    task are supported.
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