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