Unresolved reference: setPluginRegistrant

Hi, @mehdok ! I’m trying to use a code in MainActivity.kt:

` import io.flutter.app.FlutterApplication import io.flutter.plugin.common.PluginRegistry import io.flutter.plugin.common.PluginRegistry.PluginRegistrantCallback import io.flutter.plugins.pathprovider.PathProviderPlugin import io.flutter.view.FlutterMain import rekab.app.background_locator.IsolateHolderService

class Application : FlutterApplication(), PluginRegistrantCallback { override fun onCreate() { super.onCreate() IsolateHolderService.setPluginRegistrant(this) FlutterMain.startInitialization(this) }

  override fun registerWith(registry: PluginRegistry?) {
      if (!registry!!.hasPlugin("io.flutter.plugins.pathprovider")) {
          PathProviderPlugin.registerWith(registry.registrarFor("io.flutter.plugins.pathprovider"))
      }
  }

} `

but I receive an error: ’ Unresolved reference: setPluginRegistrant’ Could you please help me with that?