Expose declaring class for FieldRef

core/src/main/java/org/kohsuke/stapler/lang/FieldRef.java

@@ -50,6 +50,13 @@ public boolean keep(FieldRef m) {
      */
     public abstract String getQualifiedName();
 
+    /**
+     * Returns the {@code Class} object representing the class or interface
+     * that declares the executable represented by this object.
+     * @see java.lang.reflect.Member#getDeclaringClass()
+     */
+    public abstract Class<?> getDeclaringClass();
+
     /**
      * Gets the signature for this for use in lists
      *
@@ -107,6 +114,11 @@ public String getSignature() {
                 return String.join(" ", prefix, f.getDeclaringClass().getName(), getName());
             }
 
+            @Override
+            public Class<?> getDeclaringClass() {
+                return f.getDeclaringClass();
+            }
+
             @Override
             public String getQualifiedName() {
                 return f.getDeclaringClass().getName()+"."+getName();

jelly/src/test/java/org/kohsuke/stapler/jelly/issue76/ProtectedClass.java

@@ -97,6 +97,11 @@ protected FieldRef getBase() {
                         return f;
                     }
 
+                    @Override
+                    public Class<?> getDeclaringClass() {
+                        return f.getDeclaringClass();
+                    }
+
                     @Override
                     public String getSignature() {
                         return f.getQualifiedName(); // doesn't really matter