init research

dataframe/plugins/kotlin-dataframe/testData/box/csDsl/rename.kt

@@ -0,0 +1,16 @@
+import org.jetbrains.kotlinx.dataframe.*
+import org.jetbrains.kotlinx.dataframe.annotations.*
+import org.jetbrains.kotlinx.dataframe.api.*
+import org.jetbrains.kotlinx.dataframe.io.*
+
+fun box(): String {
+    val df1 = df.select { expr { age } into "age2" }
+    val i1: Int = df1.age2[0]
+
+    val df2 = dataFrameOf("lists")(listOf(1, 2), listOf(3)).explode { lists into "int" }
+    val i2: Int = df2.int[0]
+
+    df.select { age named "age2" }.compareSchemas(strict = true)
+
+    return "OK"
+}