init research

dataframe/plugins/kotlin-dataframe/testData/box/dataRowSchemaApi.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.*
+
+@DataSchema
+class Schema(
+    val a: Int,
+    val b: String
+)
+
+fun box(): String {
+    val df = dataFrameOf(Schema(1, "foo")).append(Schema(2, "bar"))
+    df.print()
+    return "OK"
+}