How to config maxAllowableOffset of layers for search?

[songfaqi]

How to config maxAllowableOffset of layers for search, or where the code i can update? When i update the code in function _createWebMapItemSources of SearchSources.js as follows:
source.featureLayer = new FeatureLayer(url, { outFields: outFields, maxAllowableOffset: 0.01 });
It does't work!