Seems to have an issue:
Checking Syntax...
D:\PTC\Windchill_10.2\Windchill\temp\WfExpression99618082.java:28: error: cannot find symbol
if(WorkInProgressHelper.isCheckedOut(doc))
^
symbol: variable WorkInProgressHelper
location: class WfExpression99618082
Note: D:\PTC\Windchill_10.2\Windchill\temp\WfExpression99618082.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
1 error
Syntax check complete.