Add sample for orEmpty method

libraries/stdlib/samples/test/samples/collections/maps.kt

@@ -119,6 +119,15 @@ class Maps {
             assertFalse(map.isNullOrEmpty())
         }
 
+        @Sample
+        fun mapOrEmpty() {
+            val nullMap: Map<String, Any>? = null
+            assertPrints(nullMap.orEmpty(), "{}")
+
+            val map: Map<Char, Int>? = mapOf('a' to 1, 'b' to 2, 'c' to 3)
+            assertPrints(map.orEmpty(), "{a=1, b=2, c=3}")
+        }
+
         @Sample
         fun mapIfEmpty() {
             val emptyMap: Map<String, Int> = emptyMap()

libraries/stdlib/src/kotlin/collections/Maps.kt

@@ -158,6 +158,8 @@ public inline fun <K, V> Map<out K, V>?.isNullOrEmpty(): Boolean {
 
 /**
  * Returns the [Map] if its not `null`, or the empty [Map] otherwise.
+ *
+ * @sample samples.collections.Maps.Usage.mapOrEmpty
  */
 @kotlin.internal.InlineOnly
 public inline fun <K, V> Map<K, V>?.orEmpty(): Map<K, V> = this ?: emptyMap()