init research

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

@@ -0,0 +1,17 @@
+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 {
+    compareSchemas(
+        df.select { age and city and weight },
+        df.select { age..weight },
+    )
+
+    compareSchemas(
+        df.select { name.firstName and name.lastName },
+        df.select { name.firstName..name.lastName }
+    )
+    return "OK"
+}