Class Fl
   size=1 align=1
   base size=0 base align=1
Fl (0x0x7fc0f501b8a0) 0 empty

Class Fl_Label
   size=20 align=4
   base size=20 base align=4
Fl_Label (0x0x7fc0f501b960) 0

Vtable for Fl_Widget
Fl_Widget::_ZTV9Fl_Widget: 7u entries
0     (int (*)(...))0
4     (int (*)(...))(& _ZTI9Fl_Widget)
8     0u
12    0u
16    (int (*)(...))__cxa_pure_virtual
20    (int (*)(...))Fl_Widget::handle
24    (int (*)(...))Fl_Widget::resize

Class Fl_Widget
   size=68 align=4
   base size=68 base align=4
Fl_Widget (0x0x7fc0f501b9c0) 0
    vptr=((& Fl_Widget::_ZTV9Fl_Widget) + 8u)

Class <anonymous struct>
   size=12 align=4
   base size=12 base align=4
<anonymous struct> (0x0x7fc0f501ba80) 0

