enableSassLoader(sassLoaderOptionsCallback = () => {}, encoreOptions = {}) {
        webpackConfig.enableSassLoader(sassLoaderOptionsCallback, encoreOptions);

        return this;
    }
Call this if you plan on loading SASS files.

```
Encore.enableSassLoader();
```

Or pass options to node-sass

```
Encore.enableSassLoader(function(options) {
    // https://github.com/sass/node-sass#options
    // options.includePaths = [...]
}, {
    // set optional Encore-specific options
    // resolveUrlLoader: true
});
```

Supported options:
     - {boolean} resolveUrlLoader (default=true)
             Whether or not to use the resolve-url-loader.
             Setting to false can increase performance in some
             cases, especially when using bootstrap_sass. But,
             when disabled, all url()'s are resolved relative
             to the original entry file... not whatever file
             the url() appears in.
     - {object} resolveUrlLoaderOptions (default={})
             Options parameters for resolve-url-loader
             // https://www.npmjs.com/package/resolve-url-loader#options

@param {OptionsCallback<object>} sassLoaderOptionsCallback
@param {{resolveUrlLoader?: boolean, resolveUrlLoaderOptions?: object}} encoreOptions
@returns {Encore}