code: public List/*<Filter>*/ getFilters(String filterExpression) {
          if(_filters == null || filterExpression == null)
              return null;
          else return lookupFilters(filterExpression);
      }
docs: Get a {@link List} of {@link Filter} objects.  The list returned will contain
  all of the {@link Filter} objects whose {@link Filter#getFilterExpression()} matches the given
  <code>filterExpression</code>.
  @param filterExpression the expression whose matching filters to find
  @return <code>null</code> if no matching {@link Filter} objects are found; a {@link List} of {@link Filter}
  objects otherwise.