text: /*---------------------------------------------------------------------------
    Copyright 2020 Microsoft Corporation.
  
    This is free software; you can redistribute it and/or modify it under the
    terms of the Apache License, Version 2.0. A copy of the License can be
    found in the file "license.txt" at the root of this distribution.
  ---------------------------------------------------------------------------*/
  
  // Export module `mod` extended with `exp`. Modifies `exp` in place and assigns to mod
  function _export(mod,exp) {
    for(var prop in mod) {
      if (exp[prop] === undefined) {
        exp[prop] = mod[prop];
      }
    }
    return exp;
  }
  
  // Add "_export" to the exports of this module
  $std_core_types = _export( $std_core_types, {
                      "_export": _export,
                    });
  