Cannot add custom payload for integrations about actions-on-google-java HOT 3 CLOSED

// com/google/actions/api/impl/DialogflowResponse.kt

internal class DialogflowResponse internal constructor(
        responseBuilder: ResponseBuilder) : ActionResponse {
    override val webhookResponse: WebhookResponse
    override val appResponse: AppResponse? = null
    override val expectUserResponse: Boolean?
        get() = googlePayload?.expectUserResponse

    internal var conversationData: MutableMap<String, Any>? = null
    internal var googlePayload: AogResponse? = null
    internal var contexts: MutableList<ActionContext>? = ArrayList()
    internal var sessionEntityTypes: MutableList<SessionEntityType>? = ArrayList()
    internal var sessionId: String? = null

    init {
        conversationData = responseBuilder.conversationData
        sessionId = responseBuilder.sessionId
        if (responseBuilder.webhookResponse != null) {
            webhookResponse = responseBuilder.webhookResponse!!
        } else {
            webhookResponse = WebhookResponse()
        }
        if (webhookResponse.fulfillmentText == null) {
            webhookResponse.fulfillmentText = responseBuilder.fulfillmentText
        }
        googlePayload = responseBuilder.buildAogResponse()
    }

// com/google/actions/api/impl/io/ResponseSerializer.kt

    private fun serializeDialogflowResponseV2(
            dialogflowResponse: DialogflowResponse): String {
        val gson = GsonBuilder().create()
        val googlePayload = dialogflowResponse.googlePayload
        val webhookResponse = dialogflowResponse.webhookResponse
        val conversationData = dialogflowResponse.conversationData
        val contexts = dialogflowResponse.contexts
        val sessionEntityTypes = dialogflowResponse.sessionEntityTypes

        if (googlePayload != null) {
            val aogPayload = DialogflowGooglePayload(googlePayload)

            val map = HashMap<String, Any>()
            map["google"] = aogPayload
            webhookResponse.payload = map
        }