http://codereview.appspot.com/1245044/diff/1/3 File java/gadgets/src/main/java/org/apache/shindig/gadgets/rewrite/MutableContent.java (right):
http://codereview.appspot.com/1245044/diff/1/3#newcode229 java/gadgets/src/main/java/org/apache/shindig/gadgets/rewrite/MutableContent.java:229: return pipelinedData; to avoid mandating that clients to null-checks, how about returning a private static final Map<String, Object> EMPTY_MAP = ImmutableMap.of(); ? http://codereview.appspot.com/1245044/show
