[Serialization] Reorganize module structure

plugins/kotlinx-serialization/testData/firMembers/multipleProperties.kt

@@ -0,0 +1,26 @@
+// WITH_STDLIB
+
+import kotlinx.serialization.*
+import kotlinx.serialization.json.*
+
+@Serializable
+class SomeClass(val ctor: Int) {
+    var body: String = ""
+
+    // Not serializable: no backing field
+    val getter: Int get() = 42
+}
+
+fun test(targetString: String): String {
+    val c = SomeClass(1).apply { body = "x" }
+    val s = Json.encodeToString(SomeClass.serializer(), c)
+    if (s != targetString) return s
+    val i = Json.decodeFromString(SomeClass.serializer(), s)
+    if (i.ctor != c.ctor) return "Incorrect ctor"
+    if (i.body != c.body) return "Incorrect body"
+    return "OK"
+}
+
+fun box(): String {
+    return test("""{"ctor":1,"body":"x"}""")
+}