public @Nls(capitalization = Title) @NotNull String getSearchString() {
    String searchString = mySearchString;
    if (searchString != null) {
      return searchString;
    }
    String usagesString = myUsagesString;
    if (usagesString != null) {
      return StringUtil.capitalize(myUsagesString);
    }
    LOG.error("search string must be set");
    return "";
  }
public @Nls(capitalization = Title) @NotNull String getSearchString()