Support for has key

src/Provider/ConfigSection.php

@@ -44,6 +44,18 @@ public function getName()
     return $this->_name;
   }
 
+  /**
+   * Check to see if a config item exists within the configuration
+   *
+   * @param $key
+   *
+   * @return bool
+   */
+  public function has($key)
+  {
+    return isset($this->_items[$key]);
+  }
+
   /**
    * Retrieve an item from the configuration
    *