Add getValue helper.

lodash.js

@@ -1006,6 +1006,18 @@
     return '\\' + stringEscapes[chr];
   }
 
+  /**
+   * Gets the value at `key` of `object`.
+   *
+   * @private
+   * @param {Object} object The object to query.
+   * @param {string} key The key of the property to get.
+   * @returns {*} Returns the property value.
+   */
+  function getValue(object, key) {
+    return object[key];
+  }
+
   /**
    * Gets the index at which the first occurrence of `NaN` is found in `array`.
    *
@@ -5393,7 +5405,7 @@
      * @returns {*} Returns the function if it's native, else `undefined`.
      */
     function getNative(object, key) {
-      var value = object[key];
+      var value = getValue(object, key);
       return (isMaskable(value) ? baseIsNative : isNative)(value) ? value : undefined;
     }