[8.x] Deprecate old collection and macroable objects

src/Illuminate/Support/Arr.php

@@ -4,6 +4,9 @@
 
 use Illuminate\Collections\Arr as BaseArr;
 
+/**
+ * @deprecated Will be removed in a future Laravel version.
+ */
 class Arr extends BaseArr
 {
     //

src/Illuminate/Support/Collection.php

@@ -4,6 +4,9 @@
 
 use Illuminate\Collections\Collection as BaseCollection;
 
+/**
+ * @deprecated Will be removed in a future Laravel version.
+ */
 class Collection extends BaseCollection
 {
     /**

src/Illuminate/Support/Enumerable.php

@@ -4,6 +4,9 @@
 
 use Illuminate\Collections\Enumerable as BaseEnumerable;
 
+/**
+ * @deprecated Will be removed in a future Laravel version.
+ */
 interface Enumerable extends BaseEnumerable
 {
     //

src/Illuminate/Support/LazyCollection.php

@@ -5,6 +5,9 @@
 use Closure;
 use Illuminate\Collections\LazyCollection as BaseLazyCollection;
 
+/**
+ * @deprecated Will be removed in a future Laravel version.
+ */
 class LazyCollection extends BaseLazyCollection
 {
     /**

src/Illuminate/Support/Traits/Macroable.php

@@ -4,6 +4,9 @@
 
 use Illuminate\Macroable\Macroable as BaseMacroable;
 
+/**
+ * @deprecated Will be removed in a future Laravel version.
+ */
 trait Macroable
 {
     use BaseMacroable;