将Kendo Grid FIlter逻辑运算符设置为默认值

Question

我有我的extra = true，以便显示两个过滤器值，但是在Kendo Angular 2中，中间的复合逻辑运算符默认为“ AND”吗？如何将其默认设置为“ OR”？

  <kendo-grid-column width="225" field="{{colName}}"  format="{0:g}" filter='numeric'>
        <ng-template kendoGridFilterMenuTemplate let-filter let-column="column" let-filterService="filterService">
          <kendo-grid-string-filter-menu [column]="column" [filter]="filter" [filterService]="filterService" operator="contains">
          </kendo-grid-string-filter-menu>
        </ng-template>
      </kendo-grid-column>