c_g_dbus_connection_call

Undocumented in source but is binding to C. You might be able to learn more by searching the web for its name.
__gshared extern (C)
void function(GDBusConnection* connection, gchar* busName, gchar* objectPath, gchar* interfaceName, gchar* methodName, GVariant* parameters, GVariantType* replyType, GDBusCallFlags flags, gint timeoutMsec, GCancellable* cancellable, GAsyncReadyCallback callback, void* userData) c_g_dbus_connection_call;

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