Dear everyone,      I use telepathy to write a instant messaging project, it can connect to the server, but i don't know how to use "tp_chan_iface_group_get_all_members" to  call the method--"GetAllMembers", i don't know deliver what to the parameter "proxy".  I  can't find which object to use, and how to get the object.     I need your help, thank you.     What i got as follow: **(process:848): DEBUG: inteface: org.freedesktop.Telepathy.Connection.Interface.Aliasing ** (process:848): DEBUG: inteface: org.freedesktop.Telepathy.Connection.Interface.Capabilities ** (process:848): DEBUG: inteface: org.freedesktop.Telepathy.Connection.Interface.Presence ** (process:848): DEBUG: inteface: org.freedesktop.Telepathy.Connection.Interface.Avatars ** (process:848): DEBUG: inteface: org.laptop.Telepathy.BuddyInfo ** (process:848): DEBUG: inteface: org.laptop.Telepathy.ActivityProperties ** (process:848): DEBUG: handler_name: tester1@** handler: 1 ** (process:848): DEBUG: object_path: /org/freedesktop/Telepathy/Connection/gabble/jabber/tester1_40ch_2dzlj_2erd_2efrancetelecom_2efr_2fTelepathy/RosterChannel/Group/zzz ** (process:848): DEBUG: chan_iface : org.freedesktop.Telepathy.Channel.Type.ContactList ** (process:848): DEBUG: handle_type: 4 ** (process:848): DEBUG: handle     : 1 ** (process:848): DEBUG: object_path: /org/freedesktop/Telepathy/Connection/gabble/jabber/tester1_40ch_2dzlj_2erd_2efrancetelecom_2efr_2fTelepathy/RosterChannel/Group/co_2dworkers ** (process:848): DEBUG: chan_iface : org.freedesktop.Telepathy.Channel.Type.ContactList ** (process:848): DEBUG: handle_type: 4 ** (process:848): DEBUG: handle     : 2 ** (process:848): DEBUG: object_path: /org/freedesktop/Telepathy/Connection/gabble/jabber/tester1_40ch_2dzlj_2erd_2efrancetelecom_2efr_2fTelepathy/RosterChannel/List/publish ** (process:848): DEBUG: chan_iface : org.freedesktop.Telepathy.Channel.Type.ContactList ** (process:848): DEBUG: handle_type: 3 ** (process:848): DEBUG: handle     : 1 ** (process:848): DEBUG: object_path: /org/freedesktop/Telepathy/Connection/gabble/jabber/tester1_40ch_2dzlj_2erd_2efrancetelecom_2efr_2fTelepathy/RosterChannel/List/subscribe ** (process:848): DEBUG: chan_iface : org.freedesktop.Telepathy.Channel.Type.ContactList ** (process:848): DEBUG: handle_type: 3 ** (process:848): DEBUG: handle     : 2 ** (process:848): DEBUG: object_path: /org/freedesktop/Telepathy/Connection/gabble/jabber/tester1_40ch_2dzlj_2erd_2efrancetelecom_2efr_2fTelepathy/RosterChannel/List/known ** (process:848): DEBUG: chan_iface : org.freedesktop.Telepathy.Channel.Type.ContactList ** (process:848): DEBUG: handle_type: 3 ** (process:848): DEBUG: handle     : 3 ** (process:848): DEBUG: object_path: /org/freedesktop/Telepathy/Connection/gabble/jabber/tester1_40ch_2dzlj_2erd_2efrancetelecom_2efr_2fTelepathy/ImChannel1 ** (process:848): DEBUG: chan_iface : org.freedesktop.Telepathy.Channel.Type.Text ** (process:848): DEBUG: handle_type: 1 ** (process:848): DEBUG: handle     : 1 ** (process:848): DEBUG: _handle_mcd_errors: client id is : 1.85 (error comes for :1.85)