BUG: PadstackInstance.net.name crash when net.is_null

[svandenb-dev]

🔍 Before submitting the issue

• I have searched among the existing issues
• I am using a Python virtual environment

🐞 Description of the bug

You might consider as an Enhancement since this can tested but I found it annoying when we try to get pin names without testing the net before. Would be nice to add Net.name = "" when Net.is_null. Because the API doesn't handle the exception and crash.

📝 Steps to reproduce

NA

💻 Which operating system are you using?

Windows

📀 Which ANSYS version are you using?

No response

🐍 Which Python version are you using?

3.10

📦 Installed packages

NA