<https://github.com/edvin/tornadofx/blob/17581690b...

# tornadofx

[r4zzz4k]

https://github.com/edvin/tornadofx/blob/17581690bdebadb6df1a0d96b9cfc3fdb376ac79/src/main/java/tornadofx/Forms.kt#L266
Shot myself in the foot by forgetting to wrap `field`s in fieldset when declaring form. Maybe `!!s should be replaced by?: error(...)`?
Of course I should've RTFM before trying, but still kotlin.KotlinNullPointerException is not very pleasant beast to see 😜