lodash: changed _.isFunction() method

lodash/lodash-tests.ts

@@ -1215,6 +1215,12 @@ result = <boolean>_(1).isFinite();
 result = <boolean>_<any>([]).isFinite();
 result = <boolean>_({}).isFinite();
 
+// _.isFunction
+result = <boolean>_.isFunction(any);
+result = <boolean>_(1).isFunction();
+result = <boolean>_<any>([]).isFunction();
+result = <boolean>_({}).isFunction();
+
 // _.isMatch
 var testIsMatchCustiomizerFn: (value: any, other: any, indexOrKey: number|string) => boolean;
 result = <boolean>_.isMatch({}, {});
@@ -1470,8 +1476,6 @@ result = <boolean>_(testEqArray).isEqual(testEqOtherArray, testEqCustomizerFn);
 result = <boolean>_.eq(testEqArray, testEqOtherArray, testEqCustomizerFn);
 result = <boolean>_(testEqArray).eq(testEqOtherArray, testEqCustomizerFn);
 
-result = <boolean>_.isFunction(_);
-
 result = <boolean>_.isNull(null);
 result = <boolean>_.isNull(undefined);
 

lodash/lodash.d.ts

@@ -6215,6 +6215,23 @@ declare module _ {
         isFinite(): boolean;
     }
 
+    //_.isFunction
+    interface LoDashStatic {
+        /**
+         * Checks if value is classified as a Function object.
+         * @param value The value to check.
+         * @return Returns true if value is correctly classified, else false.
+         **/
+        isFunction(value?: any): boolean;
+    }
+
+    interface LoDashWrapperBase<T, TWrapper> {
+        /**
+         * @see _.isFunction
+         */
+        isFunction(): boolean;
+    }
+
     //_.isMatch
     interface isMatchCustomizer {
         (value: any, other: any, indexOrKey?: number|string): boolean;
@@ -7090,16 +7107,6 @@ declare module _ {
            thisArg?: any): boolean;
     }
 
-    //_.isFunction
-    interface LoDashStatic {
-        /**
-        * Checks if value is a function.
-        * @param value The value to check.
-        * @return True if the value is a function, else false.
-        **/
-        isFunction(value?: any): boolean;
-    }
-
     //_.isNull
     interface LoDashStatic {
         /**