Expect/actual kotlin.Throws annotation

#KT-34848

libraries/stdlib/src/kotlin/annotations/Throws.kt

@@ -0,0 +1,20 @@
+/*
+ * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * 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
+
+import kotlin.reflect.KClass
+
+/**
+ * This annotation indicates what exceptions should be declared by a function when compiled to a platform method
+ * in Kotlin/JVM and Kotlin/Native.
+ *
+ * @property exceptionClasses the list of checked exception classes that may be thrown by the function.
+ */
+@SinceKotlin("1.4")
+@Target(AnnotationTarget.FUNCTION, AnnotationTarget.PROPERTY_GETTER, AnnotationTarget.PROPERTY_SETTER, AnnotationTarget.CONSTRUCTOR)
+@Retention(AnnotationRetention.BINARY)
+@OptionalExpectation
+public expect annotation class Throws(vararg val exceptionClasses: KClass<out Throwable>)