Generating stub methods for read-only map and entry.

compiler/testData/codegen/box/builtinStubMethods/Map.kt

@@ -0,0 +1,30 @@
+class MyMap<K, V>: Map<K, V> {
+    override fun size(): Int = 0
+    override fun isEmpty(): Boolean = true
+    override fun containsKey(key: Any?): Boolean = false
+    override fun containsValue(value: Any?): Boolean = false
+    override fun get(key: Any?): V? = null
+    override fun keySet(): Set<K> = throw UnsupportedOperationException()
+    override fun values(): Collection<V> = throw UnsupportedOperationException()
+    override fun entrySet(): Set<Map.Entry<K, V>> = throw UnsupportedOperationException()
+}
+
+fun expectUoe(block: () -> Unit) {
+    try {
+        block()
+        throw AssertionError()
+    } catch (e: UnsupportedOperationException) {
+    }
+}
+
+fun box(): String {
+    val map = MyMap<String, Int>() as MutableMap<String, Int>
+
+    expectUoe { map.put("", 1) }
+    expectUoe { map.remove("") }
+    expectUoe { map.putAll(map) }
+    expectUoe { map.clear() }
+
+    return "OK"
+}
+