Looks up the GType to be used when creating socket connections on sockets with the specified family, type and protocol_id.
If no type is registered, the gio.SocketConnection base type is returned.
a GSocketFamily
a GSocketType
a protocol id
a GType
2.22
Looks up the GType to be used when creating socket connections on sockets with the specified family, type and protocol_id.
If no type is registered, the gio.SocketConnection base type is returned.