@Override
  public PsiElement getDocumentationElementForLookupItem(PsiManager psiManager, Object object, PsiElement element) {
    if (object instanceof Configuration) {
      return new ConfigurationElement((Configuration)object, psiManager);
    }
    return null;
  }
@Override
  public PsiElement getDocumentationElementForLookupItem(PsiManager psiManager, Object object, PsiElement element)