}

    private
    fun <P : FlowParameters> configureParametersFor(
        action: Class<out FlowAction<P>>,
        configure: Action<in FlowActionSpec<P>>
    ): P? = parametersTypeOf(action)?.let { parametersType ->
        flowParametersInstantiator.newInstance(parametersType) { parameters ->
            val spec = specInstantiator.newInstance(DefaultFlowActionSpec::class.java, parameters)