let js_type_number: string;
let js_type_string: string;
let js_type_object: string;
let js_type_boolean: string;
let js_undefined: string;
let js_prop_length: string;
let setter_suffix: string;
let setter_suffix_len: int;
let unsafe_downgrade: string;
let package_name: string;
let gentype_import: string;
let exception_id: string;
let polyvar_hash: string;
let polyvar_value: string;