Function gio_sys::g_list_store_find_with_equal_func

pub unsafe extern "C" fn g_list_store_find_with_equal_func(
    store: *mut GListStore, 
    item: *mut GObject, 
    equal_func: GEqualFunc, 
    position: *mut c_uint
) -> gboolean

This is supported on crate feature v2_64 only.