ensure groupmapper is proxyable inter classloaders
diff --git a/src/main/java/org/apache/geronimo/microprofile/impl/jwtauth/jaxrs/GroupMapper.java b/src/main/java/org/apache/geronimo/microprofile/impl/jwtauth/jaxrs/GroupMapper.java
index 490d321..626cf6f 100644
--- a/src/main/java/org/apache/geronimo/microprofile/impl/jwtauth/jaxrs/GroupMapper.java
+++ b/src/main/java/org/apache/geronimo/microprofile/impl/jwtauth/jaxrs/GroupMapper.java
@@ -52,7 +52,7 @@
 
     }
 
-    Collection<String> map(final String tokenName) {
+    public Collection<String> map(final String tokenName) {
         return ofNullable(mapping.get(tokenName)).orElse(singletonList(tokenName));
     }
 }