Move the default parameters for methods from Node to Face.
diff --git a/ndn-cpp/face.cpp b/ndn-cpp/face.cpp
index 7b0d3ea..a2503fe 100644
--- a/ndn-cpp/face.cpp
+++ b/ndn-cpp/face.cpp
@@ -9,6 +9,18 @@
 
 namespace ndn {
   
+void Face::expressInterest(const Name &name, const Interest *interestTemplate, const OnData &onData, const OnTimeout &onTimeout)
+{
+  if (interestTemplate)
+    node_.expressInterest(Interest
+      (name, interestTemplate->getMinSuffixComponents(), interestTemplate->getMaxSuffixComponents(),
+       interestTemplate->getPublisherPublicKeyDigest(), interestTemplate->getExclude(),
+       interestTemplate->getChildSelector(), interestTemplate->getAnswerOriginKind(),
+       interestTemplate->getScope(), interestTemplate->getInterestLifetimeMilliseconds()), onData, onTimeout);
+  else
+    node_.expressInterest(Interest(name, 4000.0), onData, onTimeout);  
+}
+
 void Face::shutdown()
 {
   node_.shutdown();