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#[repr(C)]
#[derive(Debug, Copy, Clone)]
pub struct Fl_Widget {
_unused: [u8; 0],
}
pub type Fl_Callback = ::std::option::Option<
unsafe extern "C" fn(arg1: *mut Fl_Widget, arg2: *mut ::std::os::raw::c_void),
>;
pub type custom_handler_callback = ::std::option::Option<
unsafe extern "C" fn(
arg1: ::std::os::raw::c_int,
arg2: *mut ::std::os::raw::c_void,
) -> ::std::os::raw::c_int,
>;
pub type custom_draw_callback =
::std::option::Option<unsafe extern "C" fn(arg1: *mut ::std::os::raw::c_void)>;
extern "C" {
pub fn Fl_Widget_callback_with_captures(
arg1: *mut Fl_Widget,
cb: Fl_Callback,
arg2: *mut ::std::os::raw::c_void,
);
}