@Override
  public UPolyadicExpression getEnclosingLiteral(PsiFile file, Editor editor) {
    final PsiElement elementAt = file.findElementAt(editor.getCaretModel().getOffset());
    return getEnclosingLiteralConcatenation(elementAt);
  }
@Override
  public UPolyadicExpression getEnclosingLiteral(PsiFile file, Editor editor)