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kotlinlang

I'm trying to convert `java.time.LocalDateTime` to `org.joda.time.DateTime` and back, so far I have created this extensions which seem to work fine:
```
fun java.time.LocalDateTime.toJoda(): org.joda.time.DateTime = DateTime(this.atZone(ZoneId.systemDefault()).toInstant().toEpochMilli())
fun org.joda.time.DateTime.toJava(): java.time.LocalDateTime = LocalDateTime.ofInstant(Instant.ofEpochMilli(this.millis), ZoneId.systemDefault())
```
The _LocalDateTime_ is used by _JavaFX's DatePicker_, and the _DateTime_ is used by _Exposed_.
Any comments or suggestions?

there’s some mismatch since LocalDateTime doesn’t really correspond to DateTime - if you’re ok with the assumption of “same instant in the local timezone”, this is fine, but you should be aware it’s a bit wonky

it’s likely that you are expecting to have the user pick a date in their local timezone, so it seems reasonable here