Regex with Search Options Filter

I'm trying to use a filter SearchOptionsBuilder class, I would like to know how I can use regexp with these filters? I'm trying to do something like this:

SearchOptionsBuilder builder = new SearchOptionsBuilder (0, 100); builder.filter (HumanTaskInstanceSearchDescriptor.NAME, "^MYPATTERN.*"); SearchResult = processAPI humanTaskInstanceResults.searchMyAvailableHumanTasks (10L),builder.done ());

if anyone knows how I can implement it?

Greetings

im using Bonita 6.2