Add sample of hashMapOf

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

@@ -63,6 +63,17 @@ class Maps {
             assertPrints(map, "{1=x, 2=1.05}")
         }
 
+        @Sample
+        fun emptyHashMap() {
+            val map = hashMapOf<Int, Any?>()
+            assertTrue(map.isEmpty())
+
+            map[1] = "x"
+            map[2] = 1.05
+            // Now map contains something:
+            assertPrints(map, "{1=x, 2=1.05}")
+        }
+
     }
 
 

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

@@ -88,6 +88,8 @@ public fun <K, V> mutableMapOf(vararg pairs: Pair<K, V>): MutableMap<K, V> =
 
 /**
  * Returns an empty new [HashMap].
+ *
+ * @sample samples.collections.Maps.Instantiation.emptyHashMap
  */
 @SinceKotlin("1.1")
 @kotlin.internal.InlineOnly