1 files changed, 11 insertions, 0 deletions
diff --git a/node_modules/core-js/features/map/key-by.js b/node_modules/core-js/features/map/key-by.js
new file mode 100644
index 0000000..b156f02
--- /dev/null
+++ b/node_modules/core-js/features/map/key-by.js
@@ -0,0 +1,11 @@
+'use strict';
+require('../../modules/es.map');
+require('../../modules/esnext.map.key-by');
+var path = require('../../internals/path');
+
+var Map = path.Map;
+var mapKeyBy = Map.keyBy;
+
+module.exports = function keyBy(source, iterable, keyDerivative) {
+  return mapKeyBy.call(typeof this === 'function' ? this : Map, source, iterable, keyDerivative);
+};