docs: public int setInitialValueFilter(final String initialFilterString) {
          final Filter filter = buildFilter(initialFilterString, getFilteringMode());
  
          if (filter != null) {
              final LazyQueryContainer container = (LazyQueryContainer) getContainerDataSource();
              try {
                  container.addContainerFilter(filter);
                  return container.size();
              } finally {
                  container.removeContainerFilter(filter);
              }
          }
  
          return 0;
      }