_(...).forIn definitions

lodash/lodash-tests.ts

@@ -677,6 +677,10 @@ result = <any>_.forIn(new Dog('Dagny'), function(value, key) {
   console.log(key);
 });
 
+	result = <_.LoDashObjectWrapper<any>>_(new Dog('Dagny')).forIn(function(value, key) {
+	  console.log(key);
+	});
+
 result = <any>_.forInRight(new Dog('Dagny'), function(value, key) {
   console.log(key);
 });

lodash/lodash.d.ts

@@ -1693,14 +1693,14 @@ declare module _ {
 		**/
 		forEachRight<T>(
 			callback: ListIterator<T, void >,
-			thisArg?: any): LoDashArrayWrapper<List<T>>;
+			thisArg?: any): LoDashArrayWrapper<T>;
 
 			/**
 			* @see _.forEachRight
 			**/
 			eachRight<T>(
 				callback: ListIterator<T, void >,
-				thisArg?: any): LoDashArrayWrapper<List<T>>;
+				thisArg?: any): LoDashArrayWrapper<T>;
 	}
 
 	interface LoDashObjectWrapper<T> {
@@ -3246,6 +3246,15 @@ declare module _ {
 			thisArg?: any): Dictionary<T>;
 	}
 
+	interface LoDashObjectWrapper {
+		/**
+		* @see _.forIn
+		**/
+		forIn<T extends {}>(
+			callback?: ObjectIterator<T, void>,
+			thisArg?: any): Dictionary<T>;
+	}
+
 	//_.forInRight
 	interface LoDashStatic {
 		/**