public VoiceMessageContent withPlainTextMessage(PlainTextMessageType plainTextMessage) {
        setPlainTextMessage(plainTextMessage);
        return this;
    }
@param plainTextMessage
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-pinpointsmsvoice/src/main/java/com/amazonaws/services/pinpointsmsvoice/model/VoiceMessageContent.java