public java.util.Map<String, MessageAttributeValue> getMessageAttributes() {
        if (messageAttributes == null) {
            messageAttributes = new com.amazonaws.internal.SdkInternalMap<String, MessageAttributeValue>();
        }
        return messageAttributes;
    }
<p>
Each message attribute consists of a <code>Name</code>, <code>Type</code>, and <code>Value</code>. For more
information, see <a href=
"https://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/sqs-message-metadata.html#sqs-message-attributes"
>Amazon SQS message attributes</a> in the <i>Amazon SQS Developer Guide</i>.
</p>

@return Each message attribute consists of a <code>Name</code>, <code>Type</code>, and <code>Value</code>. For
        more information, see <a href=
        "https://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/sqs-message-metadata.html#sqs-message-attributes"
        >Amazon SQS message attributes</a> in the <i>Amazon SQS Developer Guide</i>.
aws-java-sdk-sqs/src/main/java/com/amazonaws/services/sqs/model/SendMessageRequest.java