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node_modules/core-js/internals/object-keys-internal.js

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+'use strict';
+var uncurryThis = require('../internals/function-uncurry-this');
+var hasOwn = require('../internals/has-own-property');
+var toIndexedObject = require('../internals/to-indexed-object');
+var indexOf = require('../internals/array-includes').indexOf;
+var hiddenKeys = require('../internals/hidden-keys');
+
+var push = uncurryThis([].push);
+
+module.exports = function (object, names) {
+  var O = toIndexedObject(object);
+  var i = 0;
+  var result = [];
+  var key;
+  for (key in O) !hasOwn(hiddenKeys, key) && hasOwn(O, key) && push(result, key);
+  // Don't enum bug & hidden keys
+  while (names.length > i) if (hasOwn(O, key = names[i++])) {
+    ~indexOf(result, key) || push(result, key);
+  }
+  return result;
+};