diff --git a/classes/components.php b/classes/components.php
index 0ad0f37..10bbcc0 100644
--- a/classes/components.php
+++ b/classes/components.php
@@ -36,6 +36,16 @@ class Components {
         self::$components[ $name ] = $value;
         return true;
     }
+    public static function setIfNull( $name, $value = '' ) {
+        if ( ! empty( self::$components[ $name ] ) ) {
+            return;
+        }
+        if ( null == $value ) {
+            $value = '';
+        }
+        self::$components[ $name ] = $value;
+        return true;
+    }
     public static function unset( $name ) {
         if ( isset( self::$components[ $name ] ) ) {
             unset( self::$components[ $name ] );