Peek data in DBus

I wonderd to see what data flow in DBus,related to gnome applications . I memorize here how to watch the data.
To do this,simply use dbus-monitor like this,

dbus-monitor --session --monitor

And it shows the data like this,

...snip...
method call sender=:1.7 -> dest=:1.2 serial=379 path=/org/gnome/SessionManager; interface=org.gnome.SessionManager; member=IsInhibited
   uint32 8
method return sender=:1.2 -> dest=:1.7 reply_serial=379
   boolean false
method call sender=:1.7 -> dest=:1.2 serial=380 path=/org/gnome/SessionManager; interface=org.gnome.SessionManager; member=IsInhibited
   uint32 8
method return sender=:1.2 -> dest=:1.7 reply_serial=380
   boolean false
method call sender=:1.49 -> dest=org.freedesktop.Notifications serial=416 path=/org/freedesktop/Notifications; interface=org.freedesktop.Notifications; member=GetServerInformation
method return sender=:1.19 -> dest=:1.49 reply_serial=416
   string "gnome-shell"
   string "GNOME"
   string "3.2.1"
   string "1.2"
method call sender=:1.49 -> dest=org.freedesktop.Notifications serial=417 path=/org/freedesktop/Notifications; interface=org.freedesktop.Notifications; member=Notify
   string "Banshee"
   uint32 1
   string "audio-x-generic"
   string "Foo Bar (Foo Bar)"
   string "<i>by</i> foo"
...snip...