private static @Nullable PsiPolyadicExpression getEnclosingLiteralConcatenation(final PsiElement element) {
    PsiPolyadicExpression binaryExpression = PsiTreeUtil.getParentOfType(element, PsiPolyadicExpression.class, false, PsiMember.class);
    if (binaryExpression == null) return null;
    final PsiClassType stringType = PsiType.getJavaLangString(element.getManager(), element.getResolveScope());
    if (!stringType.equals(binaryExpression.getType())) return null;
    while (true) {
      final PsiElement parent = binaryExpression.getParent();
      if (!(parent instanceof PsiPolyadicExpression parentBinaryExpression)) return binaryExpression;
      if (!stringType.equals(parentBinaryExpression.getType())) return binaryExpression;
      binaryExpression = parentBinaryExpression;
    }
  }
private static @Nullable PsiPolyadicExpression getEnclosingLiteralConcatenation(final PsiElement element)