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Naah this was not the issue. It seems like usage detail was not present for Optional so ide suggested to change the preference to warning rather error. I chose that and now it shows a warning and not error anymore.
– Puneet Jaiswal
Commented Jul 28, 2017 at 17:11
cleaning intellij ide cache didn't solve the problem for me. then I checked if I have this as an exclusion there I found it!!! but I didn't add Optional in exclusion list. I'm a guy who used to code in eclipse and now for some reason I switched to intellij. It's really not worth the effort trying to use this intelligent ide that can't solve usual stupid problems.
– Imtiaz Shakil Siddique
Commented Sep 1, 2020 at 10:10
Thanks! I think I messed up using SonarLint and somehow added this config by mistake
– Alejandro
Commented Aug 8, 2022 at 13:53

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create code fences with backticks ` or tildes ~
```
like so
```
add language identifier to highlight code
```python
def function(foo):
print(foo)
```
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