=> 0x69e537:	cmp    0x0(%rbp),%rax
   0x69e53b:	je     0x69e5e8
   0x69e541:	mov    %r12,%rsi
   0x69e544:	mov    %rbx,%rdi
   0x69e547:	callq  0x661440 <g_type_check_instance_is_a@plt>
   0x69e54c:	test   %eax,%eax
   0x69e54e:	jne    0x69e5e8
   0x69e554:	callq  0x656860 <gtk_hbox_get_type@plt>
   0x69e559:	test   %rbp,%rbp
   0x69e55c:	je     0x69e564
   0x69e55e:	cmp    0x0(%rbp),%rax
   0x69e562:	je     0x69e590
   0x69e564:	mov    %rax,%rsi
   0x69e567:	mov    %rbx,%rdi
   0x69e56a:	callq  0x661440 <g_type_check_instance_is_a@plt>
   0x69e56f:	test   %eax,%eax