@Nullable
  @Override
  protected String getTextToMatch(@NotNull ArrangementEntry entry) {
    if (entry instanceof NamespaceAwareArrangementEntry) {
      return ((NamespaceAwareArrangementEntry)entry).getNamespace();
    }
    else {
      return null;
    }
  }
@Nullable
  @Override
  protected String getTextToMatch(@NotNull ArrangementEntry entry)