init research

dataframe/plugins/kotlin-dataframe/testData/box/remove.kt

@@ -0,0 +1,15 @@
+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"
+}