Simplify for: take into account loop parameter nullability

idea/testData/intentions/iterationOverMap/DataClassNullable.kt

@@ -0,0 +1,11 @@
+// IS_APPLICABLE: false
+// WITH_RUNTIME
+
+data class XY(val x: String, val y: String)
+fun test(xys: Array<XY?>) {
+    for (<caret>xy in xys) {
+        val x = xy?.x
+        val y = xy?.y
+        println(x + y)
+    }
+}