init research

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

@@ -0,0 +1,19 @@
+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 = dataFrameOf("a", "b", "c")(1, 2, 3)
+
+    df.groupBy { a }
+        .updateGroups { remove { a } }
+        .aggregate { c into "c" }
+    return "OK"
+}
+
+