TYPEMAP
DBusConnection*	O_OBJECT_connection
GMainContext* O_OBJECT_maincontext

INPUT
O_OBJECT_connection
    if (sv_isobject($arg) && (SvTYPE(SvRV($arg)) == SVt_PVMG))
        $var = ($type)SvIV((SV*)SvRV( $arg ));
    else {
        warn( \"${Package}::$func_name() -- $var is not a blessed SV reference\" );
        XSRETURN_UNDEF;
    }

INPUT
O_OBJECT_maincontext
    if (sv_isobject($arg) && (SvTYPE(SvRV($arg)) == SVt_PVMG))
        $var = ($type)SvIV((SV*)SvRV( $arg ));
    else {
        warn( \"${Package}::$func_name() -- $var is not a blessed SV reference\" );
        XSRETURN_UNDEF;
    }