public SendVoiceMessageRequest withCallerId(String callerId) {
        setCallerId(callerId);
        return this;
    }
The phone number that appears on recipients' devices when they receive the message.

@param callerId
       The phone number that appears on recipients' devices when they receive the message.
@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/SendVoiceMessageRequest.java