Introduce common KClass interface #KT-25935

libraries/stdlib/src/kotlin/reflect/KClass.kt

@@ -0,0 +1,22 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+package kotlin.reflect
+
+/**
+ * Represents a class and provides introspection capabilities.
+ * Instances of this class are obtainable by the `::class` syntax.
+ * See the [Kotlin language documentation](http://kotlinlang.org/docs/reference/reflection.html#class-references)
+ * for more information.
+ *
+ * @param T the type of the class.
+ */
+public expect interface KClass<T : Any> {
+    /**
+     * The simple name of the class as it was declared in the source code,
+     * or `null` if the class has no name (if, for example, it is an anonymous object literal).
+     */
+    public val simpleName: String?
+}