js API中的这个"esri/layers/pixelfilters/StretchFilter" 没法加载？

init.js:37 Error: multipleDefine

    at c (init.js:11)

    at Na (init.js:33)

    at Ma (init.js:36)

    at /arcgis_js_v323_sdk/arcgis_js_api/library/3.23/3.23/esri/layers/pixelFilters/StretchFilter.js:4

    

Uncaught TypeError: StretchFilter is not a constructor

    

    上面错误 ，下面是我的代码     

     var stretch = new StretchFilter();

            stretch.stretchType = 0;

            stretch.filter = maskPixels;