Merge pull request #58 from AbdullahFaqeir/master

- Added setExists() method to Collection.

Author: AbdullahFaqeir

src/Collection.php

@@ -91,6 +91,18 @@ public function getSynonyms(): Synonyms
         return $this->synonyms;
     }
 
+    /**
+     * Set collection exists flag.
+     *
+     * @param bool $exists
+     *
+     * @return void
+     */
+    public function setExists(bool $exists): void
+    {
+        $this->exists = $exists;
+    }
+
     /**
      * @return bool|null
      */