android – 使用Dagger 2提供函数依赖

@module
class DatabaseModule {

    @Provides
    @Singleton
    fun provideDatabase(application: Application,betaFilter: (BetaFilterablE) -> Boolean): Database {
        return Database(application,BuildConfig.VERSION_CODE,betaFilter)
    }

    @Provides
    @Suppress("ConstantConditionIf")
    fun provideBetaFiler(): (BetaFilterablE) -> Boolean {
        return if (BuildConfig.FLAVOR_audience == "regular") {
            { it.betaOnly.not() }
        } else {
            { true }
        }
    }

}

不幸的是,它似乎不起作用：

[dagger.android.AndroidInjector.inject(T)] kotlin.jvm.functions.Function1<? 
super com.app.data.betaFilterable,java.lang.Boolean> 
cAnnot be provided without an @Provides-Annotated method.

我在这里错过了什么？