Add doc blocks for getFuncName and isLaziable. [ci skip]

lodash.src.js

@@ -3982,6 +3982,37 @@
       return metaMap.get(func);
     };
 
+    /**
+     * Gets the name of `func`.
+     *
+     * @private
+     * @param {Function} func The function to query.
+     * @returns {string} Returns the function name.
+     */
+    var getFuncName = (function() {
+      if (!support.funcNames) {
+        return constant('');
+      }
+      if (constant.name == 'constant') {
+        return baseProperty('name');
+      }
+      return function(func) {
+        var result = func.name,
+            array = realNames[result],
+            length = array ? array.length : 0;
+
+        while (length--) {
+          var data = array[length],
+              otherFunc = data.func;
+
+          if (otherFunc == null || otherFunc == func) {
+            return data.name;
+          }
+        }
+        return result;
+      };
+    }());
+
     /**
      * Gets the appropriate "indexOf" function. If the `_.indexOf` method is
      * customized this function returns the custom method, otherwise it returns
@@ -4144,30 +4175,13 @@
       return false;
     }
 
-    var getFuncName = (function() {
-      if (!support.funcNames) {
-        return constant('');
-      }
-      if (constant.name == 'constant') {
-        return baseProperty('name');
-      }
-      return function(func) {
-        var result = func.name,
-            array = realNames[result],
-            length = array ? array.length : 0;
-
-        while (length--) {
-          var data = array[length],
-              otherFunc = data.func;
-
-          if (otherFunc == null || otherFunc == func) {
-            return data.name;
-          }
-        }
-        return result;
-      };
-    }());
-
+    /**
+     * Checks if `func` has a lazy counterpart.
+     *
+     * @private
+     * @param {Function} func The function to check.
+     * @returns {boolean} Returns `true` if `func` has a lazy counterpart, else `false`.
+     */
     function isLaziable(func) {
       var funcName = getFuncName(func);
       return !!funcName && func === lodash[funcName] && funcName in LazyWrapper.prototype;