feat(base): support higer order messaging [wip]

Author: adhocore

src/UnderscoreBase.php

@@ -350,6 +350,23 @@ public function __call($method, $args)
         throw new UnderscoreException("The mixin with name '$method' is not defined");
     }
 
+    /**
+     * Facilitates the use of Higher Order Messaging.
+     *
+     * @param string $method
+     *
+     * @return self
+     */
+    public function __get($method)
+    {
+        // For now no mixins in HOM :)
+        if (!\method_exists($this, $method)) {
+            throw new UnderscoreException("The '$method' is not defined");
+        }
+
+        return new HigherOrderMessage($this, $method);
+    }
+
     /**
      * Get string value (JSON representation) of this instance.
      *