Constant rustdoc::html::render::USED_ID_MAP[]

pub const USED_ID_MAP: LocalKey<RefCell<FxHashMap<String, usize>>> = {
    #[inline]
    fn __init() -> RefCell<FxHashMap<String, usize>> { loop  { } }
    unsafe fn __getit()
     ->
         ::option::Option<&'static ::cell::UnsafeCell<::option::Option<RefCell<FxHashMap<String,
                                                                                         usize>>>>> {
                                                                                                        loop 
                                                                                                             {
                                                                                                        }
                                                                                                    }
    unsafe { <::thread::LocalKey>::new(__getit, __init) }
}