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node_modules/core-js/modules/esnext.reflect.get-metadata-keys.js

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+'use strict';
+// TODO: Remove from `core-js@4`
+var $ = require('../internals/export');
+var uncurryThis = require('../internals/function-uncurry-this');
+var ReflectMetadataModule = require('../internals/reflect-metadata');
+var anObject = require('../internals/an-object');
+var getPrototypeOf = require('../internals/object-get-prototype-of');
+var $arrayUniqueBy = require('../internals/array-unique-by');
+
+var arrayUniqueBy = uncurryThis($arrayUniqueBy);
+var concat = uncurryThis([].concat);
+var ordinaryOwnMetadataKeys = ReflectMetadataModule.keys;
+var toMetadataKey = ReflectMetadataModule.toKey;
+
+var ordinaryMetadataKeys = function (O, P) {
+  var oKeys = ordinaryOwnMetadataKeys(O, P);
+  var parent = getPrototypeOf(O);
+  if (parent === null) return oKeys;
+  var pKeys = ordinaryMetadataKeys(parent, P);
+  return pKeys.length ? oKeys.length ? arrayUniqueBy(concat(oKeys, pKeys)) : pKeys : oKeys;
+};
+
+// `Reflect.getMetadataKeys` method
+// https://github.com/rbuckton/reflect-metadata
+$({ target: 'Reflect', stat: true }, {
+  getMetadataKeys: function getMetadataKeys(target /* , targetKey */) {
+    var targetKey = arguments.length < 2 ? undefined : toMetadataKey(arguments[1]);
+    return ordinaryMetadataKeys(anObject(target), targetKey);
+  }
+});