defined a getter. needed by the ruby effort

core/src/main/java/hudson/Plugin.java

@@ -95,6 +95,15 @@ public abstract class Plugin implements Saveable {
     public void setServletContext(ServletContext context) {
     }
 
+    /**
+     * Gets the paired {@link PluginWrapper}.
+     *
+     * @since 1.426
+     */
+    public PluginWrapper getWrapper() {
+        return wrapper;
+    }
+
     /**
      * Called to allow plugins to initialize themselves.
      *