Pull request #3669: 无jira fix:VirtualGroup

Merge in VISUAL/fineui from ~TREECAT/fineui:master to master

* commit '608954dda7a9e1f25026ee4841c2bf7c4f4b6c2d':
  无jira fix:VirtualGroup

packages/fineui/src/base/combination/group.virtual.js

@@ -56,7 +56,7 @@ export class VirtualGroup extends Widget {
 
     _packageBtns(items) {
         const o = this.options;
-        const map = (this.buttonMap = {});
+        const btMap = (this.buttonMap = {});
         const layouts = isArray(o.layouts) ? o.layouts : [o.layouts];
         for (let i = layouts.length - 1; i > 0; i--) {
             items = map(items, (k, it) => {
@@ -68,8 +68,8 @@ export class VirtualGroup extends Widget {
                             el: extend(
                                 {
                                     ref: _ref => {
-                                        if (isKey(map[el.value])) {
+                                        if (isKey(btMap[el.value])) {
-                                            map[el.value] = _ref;
+                                            btMap[el.value] = _ref;
                                         }
                                     },
                                 },