public void setFileFilter(@Nullable String fileFilter) {
    boolean changed = !StringUtil.equals(fileFilter, this.fileFilter);
    if (changed) {
      this.fileFilter = fileFilter;
      notifyObservers();
      if (fileFilter != null) {
        List<String> split = StringUtil.split(fileFilter, ",");
        if (ContainerUtil.exists(split, s -> s.endsWith("*.iml") || s.endsWith("*.ipr") || s.endsWith("*.iws"))) {
          setSearchInProjectFiles(true);
        }
      }
    }
  }
public void setFileFilter(@Nullable String fileFilter)