Real time usage of illegal and ignore bins

In reply to dave_59:

In reply to Subbi Reddy:
Why Ignore bins - SystemVerilog - Verification Academy
What is difference between ignore bins and illegal bins - SystemVerilog - Verification Academy

I got it clear idea on ignore bins with example.
concept wise i got it what illegal bins will do but i didn’t got it real time example. please give me one real time example on illegal bins