configureSplitChunks(callback) {
        webpackConfig.configureSplitChunks(callback);

        return this;
    }
Configure the optimization.splitChunks configuration.

https://webpack.js.org/plugins/split-chunks-plugin/

```
Encore.configureSplitChunks(function(splitChunks) {
    // change the configuration
    splitChunks.minSize = 0;
});
```

@param {OptionsCallback<object>} callback
@returns {Encore}