public PsiReferenceProvider instantiate() {
    try {
      return ApplicationManager.getApplication().instantiateClass(className, pluginDescriptor);
    }
    catch (ProcessCanceledException e) {
      throw e;
    }
    catch (Exception e) {
      Logger.getInstance(PsiReferenceProviderBean.class).error(e);
    }
    return null;
  }
public PsiReferenceProvider instantiate()