init research

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

@@ -0,0 +1,12 @@
+import org.jetbrains.kotlinx.dataframe.*
+import org.jetbrains.kotlinx.dataframe.api.*
+
+fun box(): String {
+    val df = dataFrameOf("a", "b", "c")(1, 2, 3, 4, 5, 6)
+    val grouped = df.group { a and b }.into("g")
+
+    val dfMovedAfterNested = grouped.move { c }.after { g.a }
+    val cNested: DataColumn<Int> = dfMovedAfterNested.g.c
+
+    return "OK"
+}