code: public void setFilters(String filters)
      {
          for (String filter : filters.split(",")) {
              filteredFrames.add("at " + filter.trim());
          }
      }
docs: Adds new filtered frames. Any stack frame starting with <code>"at "</code> + <code>filter</code> will not be
  written to the log.
  @param filters a comma-delimited list of class names or package names to be filtered