SetGroupName for point-to-point module

src/point-to-point/model/point-to-point-channel.cc

@@ -34,6 +34,7 @@ PointToPointChannel::GetTypeId (void)
 {
   static TypeId tid = TypeId ("ns3::PointToPointChannel")
     .SetParent<Channel> ()
+    .SetGroupName ("PointToPoint")
     .AddConstructor<PointToPointChannel> ()
     .AddAttribute ("Delay", "Transmission delay through the channel",
                    TimeValue (Seconds (0)),

src/point-to-point/model/point-to-point-net-device.cc

@@ -40,6 +40,7 @@ PointToPointNetDevice::GetTypeId (void)
 {
   static TypeId tid = TypeId ("ns3::PointToPointNetDevice")
     .SetParent<NetDevice> ()
+    .SetGroupName ("PointToPoint")
     .AddConstructor<PointToPointNetDevice> ()
     .AddAttribute ("Mtu", "The MAC-level Maximum Transmission Unit",
                    UintegerValue (DEFAULT_MTU),

src/point-to-point/model/point-to-point-remote-channel.cc

@@ -38,6 +38,7 @@ PointToPointRemoteChannel::GetTypeId (void)
 {
   static TypeId tid = TypeId ("ns3::PointToPointRemoteChannel")
     .SetParent<PointToPointChannel> ()
+    .SetGroupName ("PointToPoint")
     .AddConstructor<PointToPointRemoteChannel> ()
   ;
   return tid;

src/point-to-point/model/ppp-header.cc

@@ -42,6 +42,7 @@ PppHeader::GetTypeId (void)
 {
   static TypeId tid = TypeId ("ns3::PppHeader")
     .SetParent<Header> ()
+    .SetGroupName ("PointToPoint")
     .AddConstructor<PppHeader> ()
   ;
   return tid;