import org.jetbrains.kotlinx.dataframe.*
import org.jetbrains.kotlinx.dataframe.annotations.*
import org.jetbrains.kotlinx.dataframe.api.*
import org.jetbrains.kotlinx.dataframe.io.*

data class Nested(val d: Double)

data class Record(val a: String, val b: Int, val nested: Nested)

fun box(): String {
    val df = listOf(Record("112", 42, Nested(3.0))).toDataFrame(maxDepth = 1)
    val df1 = df.remove { nested.d }
    df1.a
    return "OK"
}