Update HasResource.php

Author: pascalbaljet

src/Table/HasResource.php

@@ -136,6 +136,19 @@ public function isNotEmpty(): bool
         return !$this->isEmpty();
     }
 
+    /**
+     * Setter for the primary key of the resource.
+     *
+     * @param  string  $key
+     * @return self
+     */
+    public function primaryKey(string $key): self
+    {
+        $this->primaryKey = $key;
+
+        return $this;
+    }
+
     /**
      * Returns the primary key of the given item.
      *