@Override
  public PsiElement getDocumentationElementForLookupItem(PsiManager psiManager, Object object, PsiElement element) {
    for (DocumentationProvider provider : getAllProviders()) {
      PsiElement result = provider.getDocumentationElementForLookupItem(psiManager, object, element);
      if (result != null) {
        LOG.debug("getDocumentationElementForLookupItem: ", provider);
        return result;
      }
    }
    return null;
  }
@Override
  public PsiElement getDocumentationElementForLookupItem(PsiManager psiManager, Object object, PsiElement element)