More about Function Alias rules
> Testing
> Java function alias rules
For Java function alias rules, after you save the rule, click the Preview toolbar button to see the runtime presentation of the function alias, as it appears at runtime when users select the function alias from a selection list.
Click the Run toolbar button to test the function alias rule.
> SQL function alias rules
For SQL function alias rules, after you save the rule, if you click the Preview toolbar button, the description and template of the SQL expression the function alias makes available is displayed.
> Parent Class
The Rule-Alias-Function class is a subclass of the Rule-Utility-Function class, through directed inheritance. ( Pega Platform contains no Rule-Alias- class.)