use crateGc;
use crateNamespaceEnv;
use create_iter_builtins;
use ;
use create_misc_builtins;
// thread_local! {
// pub static PRELUDE: Gc<NamespaceEnv> = {
// let prelude = create_prelude();
// prelude
// }
// }
/// Create an Env containing the core builtins
/// Fairly expensive, should be used sparingly