diff --git a/modules/_transition.js b/modules/_transition.js
new file mode 100644
index 000000000..f9c8fa30f
--- /dev/null
+++ b/modules/_transition.js
@@ -0,0 +1,33 @@
+export function getTogglingfunction() {
+    if (arguments.length == 0) {
+        function inner(input) {
+            return !input;
+        }
+        return inner;
+    } else if (arguments.length != 1) {
+        var args = arguments;
+        function inner(input){
+            let all_arguments = Array.from(args);
+            all_arguments_length = all_arguments.length;
+            index = all_arguments.indexOf(input);
+            return all_arguments[(index + 1) % all_arguments_length];
+        }
+        return inner
+    } else if (arguments[0] instanceof Array){
+        args = arguments[0];
+        function inner(input){
+            let all_arguments = args;
+            all_arguments_length = all_arguments.length;
+            index = all_arguments.indexOf(input);
+            return all_arguments[(index + 1) % all_arguments_length];
+        }
+        return inner   
+    } else {
+        obj = arguments[0];
+        function inner(input) {
+            inner_obj = obj;
+            return inner_obj[input];
+        }
+        return inner
+    }
+}
\ No newline at end of file
diff --git a/modules/findkeys.js b/modules/findkeys.js
new file mode 100644
index 000000000..b87169f92
--- /dev/null
+++ b/modules/findkeys.js
@@ -0,0 +1,16 @@
+import cb from './_cb.js';
+import keys from './keys.js';
+
+ 
+export default function findKeys(obj, predicate, context) {
+  predicate = cb(predicate, context);
+  var _keys = keys(obj), key;
+  var arr = [];
+  for (var i = 0, length = _keys.length; i < length; i++) {
+    key = _keys[i];
+    if (predicate(obj[key], key, obj)) {
+        arr.push(key);
+    }
+  }
+  return arr;
+}
\ No newline at end of file
diff --git a/modules/index.js b/modules/index.js
index c48ca7e9e..1fef93592 100644
--- a/modules/index.js
+++ b/modules/index.js
@@ -87,6 +87,7 @@ export { default as result } from './result.js';
 export { default as uniqueId } from './uniqueId.js';
 export { default as chain } from './chain.js';
 export { default as iteratee } from './iteratee.js';
+export { default as findKeys } from './findkeys.js';
 
 // Function (ahem) Functions
 // -------------------------
diff --git a/test/utility.js b/test/utility.js
index b0cd4941c..1c40a04c0 100644
--- a/test/utility.js
+++ b/test/utility.js
@@ -465,4 +465,12 @@
     assert.strictEqual(template(), '<<\nx\n>>');
   });
 
+  QUnit.test('findkeys - extended findkey function.', function(assert) {
+    input = {'a':2, 'b':2}
+    var key = _.findKey(info, function (value) { 
+      return value === 2; 
+    }); 
+    assert.strictEqual(_.findKeys(input, ['a', 'b']))
+  });
+
 }());