Updated RequestChainable Interface and Trait

+ Added a new searchRequestChain()  method that will climb up the request chain searching for an object of a certain class
+ Added some test code for the new method in the TestRun.php file

src/Core/Interfaces/RequestChainableInterface.php

@@ -41,6 +41,18 @@ interface RequestChainableInterface
      */
     public function getRequestChain(): array;
 
+    /**
+     * Climb up the request chain searching for
+     * an object of a certain class
+     *
+     * If the object is found it will be returned,
+     * otherwise the method returns null
+     *
+     * @author Benjamin Blake (sitelease.ca)
+     * @param string $class The class of the object you are searching for
+     * @return object|null
+     */
+    public function searchRequestChain(string $class): ?object;
 
     /**
      * Return the request chain heirarchy