docs: function extraGlobals() {
    if (typeof process === 'object' && typeof process.version === 'string') {
      var parts = process.version.split('.');
      var nodeVersion = parts.reduce(function(a, v) {
        return (a << 8) | v;
      });
  
      // 'errno' was renamed to process._errno in v0.9.11.
      if (nodeVersion < 0x00090b) {
        return ['errno'];
      }
    }
  
    return [];
  }