BI-88256 fix: nashorn导出只导出一半的兼容

src/widget/multiselect/multiselect.loader.js

@@ -172,7 +172,10 @@ BI.MultiSelectLoader = BI.inherit(BI.Widget, {
     },
 
     populate: function (items) {
+        // arguments.length为0时对arguments[0]赋值后不同环境对其length的取值不同(nashorn)
+        if (BI.isNotNull(items)) {
             arguments[0] = this._createItems(items);
+        }
         this.button_group.populate.apply(this.button_group, arguments);
     },
 

src/widget/multiselect/multiselect.loader.nobar.js

@@ -161,7 +161,9 @@ BI.MultiSelectNoBarLoader = BI.inherit(BI.Widget, {
     },
 
     populate: function (items) {
+        if (BI.isNotNull(items)) {
             arguments[0] = this._createItems(items);
+        }
         this.button_group.populate.apply(this.button_group, arguments);
     },
 

src/widget/searchmultitextvaluecombo/multitextvalue.loader.search.js

@@ -158,7 +158,9 @@ BI.SearchMultiSelectLoader = BI.inherit(BI.Widget, {
     },
 
     populate: function (items) {
+        if (BI.isNotNull(items)) {
             arguments[0] = this._createItems(items);
+        }
         this.button_group.populate.apply(this.button_group, arguments);
     },