init research

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

@@ -0,0 +1,13 @@
+import org.jetbrains.kotlinx.dataframe.*
+import org.jetbrains.kotlinx.dataframe.annotations.*
+import org.jetbrains.kotlinx.dataframe.api.*
+import org.jetbrains.kotlinx.dataframe.io.*
+
+interface Cars
+
+fun box(): String {
+    val df = dataFrameOf("a")(1).cast<Cars>()
+    val df1 = df.add("age") { 2022 }
+    val col = df1.age
+    return if (col[0] == 2022) "OK" else col[0].toString()
+}